The Door Into Summer

ISBN: 0345413997
ISBN 13: 9780345413994
By: Robert A. Heinlein

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About this book

It is 1970, and electronics engineer Dan Davis has finally made the invention of a lifetime: a household robot with extraordinary abilities, destined to dramatically change the landscape of everyday routine. Then, with wild success just within reach, Dan's greedy partner and even greedier fiancée steal his work and leave him penniless, and trick him into taking the long sleep—suspended animation for thirty years. They never imagine that the future time in which Dan awakens has a very limited form of time travel, just enough that Davis can travel back and recover his research. He then again undergoes suspended animation, and awakens again in the high-tech future of the year 2000, with his reputation, fortune, and his sweetheart.

Reader's Thoughts

Nathan Van Coops

This book has a great beginning and I was immediately taken with the explanation of the title as related to the cat. As a cat lover, it was easy to relate to the protagonist on at least that point. I put the story down a few times, wandering off to other pursuits, but of the couple of books I was reading it was the least dull so I kept coming back. I never did get completely immersed. The writing was solid and the character's voice was strong, but his overwhelming confidence in his ability to succeed at everything robbed the story of much of its potential tension. The romantic story was a bit suspect as well. I found the resolution of the romance to be convenient and more than a little unrealistic. Overall, I enjoyed the story. Seeing the author's vision of the future and getting the feel of the era he was in was a nice change of pace from contemporary writing styles. I'm glad I read it, to see what all the fuss was about, but doubt I would pick it up and read it again, except for the beginning. I thought the first couple pages were authentically great.


Probably my favorite Heinlein book, a very light and entertaining story. Perfect pacing, a likeable protagonist, and an even more likeable cat, no superfluous details, and just so positive. And so what if the hero marries a woman later who he mostly knew previously as a child. I mean, Woody Allen did, but that was really creepy. Okay, best to leave that bit alone. Pretty harmless compared to Heinlein's later works.

Joanne Moyer

I loved this book and can't believe I've never read it. I've always known who Robert Heinlein is but I'm not a big true science fiction fan so have never read any of his books. I've seen some people say that The Door into Summer is different from most of his other work which maybe is a shame because I found it interesting and most surprisingly funny. I decided to check it out because a cat is a main character AND it had the bonus of time travel. I also find it interesting to read an older book, this one was originally published in 1956, that takes place in the 'future' world of 1970 and then the more future world of 2000 just to see what the author's take on what the world will be like by then


Yep. Likeable ol' Bob! He'll chat your ear off if you'll let him. He's the guy that you met on that long bus trip back in the '70s, who wouldn't shut up for the entire duration of the 12-hour trip. You wish that you had never sat next to him, but you are too polite to move to another seat. Besides, he just might follow you, without realizing that you were trying to get away from him. Because he just HAS to keep telling you his story.Okay, so Heinlein has this smooth, chatty style that's very authentic. It's almost lovable. One can sense his personality in the words. That's great! But there's something so pedestrian about the style and the story that it simply doesn't stick to my ribs. It's too similar to plain, everyday life to be memorable. C'mon, this is science fiction! I like science fiction because weird things happen in science fiction. There's nothing much weird or wondrous happening here, except for a little time travel. Otherwise, this may as well have been a crime novel, but it wouldn't be gritty enough to pass the test of a good crime novel. That said, the story is pretty sweet. The narrator is the victim of a fraudulent scheme, but everything turns out okay in the end. The narrator travels through at time loop and arranges things so that he can head off the schemers at the pass and marry his pre-adolescent sweetheart, whom he met when he was way too old for her.Whatever you do, don't give up on this book just because Pete,the ginger-ale-drinking cat, didn't make it. Bob has worked that one out, too! Dammit, Bob, you are one heckuva sweet guy. No wonder everyone loves you!


I like Robert Heinlein's early stories with their running-monologue narrative style that only he could pull off well. "Door Into Summer" is such a book, originally published in around 1957, it gives an interesting view of the "future" of 1970 and the even more distant "future" of 2000!"Despite the crepe-hangers, romanticists and anti-intellectuals, the world steadily grows better because the human mind, applying itself to environment, makes it better. With hands ... with tools ... with horse sense and science and engineering." - RAHI've read a few of Heinlein's early books and this one was the first to delve into time travel. Not really as good as his Methuselah books, still a fun read. Dan Davis is a creative engineer - not much sense when it comes to business nor to love, and gets cheated by both! Bella the secretary turns out to be a shyster - and his business partner Miles is as much a victim as Dan is.Dan describes the world of 1970, with its recent nuclear war and the capital of the USA in Denver, CO - and he decides to take the Long Sleep - a cryogenic place, run by insurance companies (who else?) and he sleeps for 30 years. And in this mix is Pete the Cat -- finiky and self-serving, as any cat can be!He is enamored by the year 2000 with its zipperless clothing and "grabbies" (movies). But what interests this reader is how he adapts the environment so well, bends it to solve his current problem of getting his former protégé Ricky (now a grown woman) and is bummed to see she is married - but that's actually not a bad thing, as we find in the last chapters.The discovery of an experimental time machine (temporal device) saves the day. The how and why I'll leave to Heinlein.Bottom Line: Enjoyable, sometimes a bit too wordy and self-narrative chatty, but overall a typical Heinlein yarn. Enjoy.Other Heinlein Collections (there are many!):Requiem: New Collected Works by Robert A. Heinlein and Tributes to the Grand MasterTOMORROW THE STARS. A Science Fiction Anthology. Edited and with an Introduction by Robert A. Heinlein.Analog Anthology # 2


Somewhat unusually for Heinlein, this is a cute, fun book which doesn't try to ladle a bunch of right-wing ideology down your throat, or O.D. you on dubious sex. There's some time travel, a sympathetic main character, a Bad Girl, and a cat who steals the show every time he appears on stage. He even gets the title: the reference is to his endearing habit, during winter months, of making the hero open each door in the house in turn, just in case one of them happens to lead into summer...

Nicholas Whyte[return][return]it's a good sf novel. Written in 1956, set in 1970 and 2000, hero is a bit of an asshole (alas, unintentionally - a hint of things to come), suspended animation takes you forward in time, the mad professor's time machine takes you back. I kept on recognising bits from films - surely that last was part of the inspiration for Back to the Future? Surely the scene with trying to get the cat into suspended animation is consciously echoed by Ripley (Sigourney Weaver) and Jones (played by himself) in Alien? OK, there are one or two plot holes, and the hero's relationship with his colleague's stepdaughter could not possibly be written as an innocent friendship these days, but taken as a novel of its time it's pretty good. The hero is 30 in 1970, born in 1940, so the book's key target readership when it was first published would have been able to think of this as their own possible future.[return][return]Of course, now that we are four years beyond the year in which the end of the book is set it's also interesting to read it as futurology (as one can also read, for instance, Bellamy's Looking Backward: from 2000 to 1887). Heinlein has a mid-1960s nuclear war, and the capital of the USA moving to Denver, which of course didn't happen; nor was suspended animation commonplace in 1970 or even 2000. But the spread of household appliances (the source of our hero's wealth) is a good call, even if he got the modalities somewhat wrong; his nearest hit is the engineer's drawing board, not too far removed from our CAD. He hints (as far as you could in 1956) at a more liberal and liberated sexual culture in the future - indeed, some would argue that Stranger in a Strange Land helped to bring that about - but completely misses the improvement in rights for non-whites as far as I can tell. (Farnham's Freehold was still eight years in the future.) The English language, thank heavens, has not changed as much in the last thirty years (or fifty) as he predicted.[return][return]Anyway, that was worth the

Derek (Guilty of thoughtcrime)

I first read this many years ago—probably about the time in which it is set: it was published in 1957 (just before I was born) but most of the story is set in 1970 and the rest in 2000/2001.  The only thing that really stayed in my memory was the reason for the title.  Dan Davis once lived in Connecticut in a house with twelve doors to the outside. In Winter, his cat Pete (Petronius the Arbiter) would make him open every door, looking for the one that led to Summer. Pete's not present for the majority of the novel, but he's very definitely a major character. I pretty much stopped reading Heinlein after Time Enough for Love. He got increasingly misogynistic and right-wing (or else, he'd always been that way and just felt he could get away with writing about it in his old age). But I'd forgotten the immense vision he brought to his earlier stories like The Roads Must Roll, the very first Heinlein I read, and Waldo and Magic, Inc, and this one. My first introduction to Science Fiction was Arthur C. Clarke, and Heinlein was my second. They share that vision of the possibilities of the future, and Clarke may actually have been technically more capable (when Clarke suggested satellites in Earth-orbit, I suspect he could have built one, with help—when Heinlein builds a general household robot he's imagining what we would want to have done, and the way it should operate, but I can't imagine he actually could have designed the necessary circuit boards), but Heinlein is far and above the better story-teller. Like many futurists, Heinlein's 50s vision of 1970 was a little too optimistic, and his vision of 2000 was much too optimistic, but still he wrote about so many things that have come to pass almost as he described. It's so stunningly accurate that the few anachronisms that creep in are totally hilarious. "For my money Chuck was the only real engineer there; the rest were overeducated slipstick mechanics."  Looking back from 60 years into Heinlein's future, it's hard to imagine that anyone would have missed the fact that "slipsticks" (slide rules) would be non-existent in 2000, and were on their way out in the 70s (I learned to use a slide rule in the early 70s, bought a beautiful one in 1977—at a huge discount—and have probably not seen one for sale since). In 2001: "The nearest twenty-four-hour bank was downtown at the Grand Circle of the Ways." I actually remember when there were less than a handful of bank machines in the whole of Toronto (~1981), but in a novel that centres on the life of an engineer who specializes in automatons, it's funny that he never imagined we could do away with physical banks for the mere dispensing of money. But those things don't detract in the slightest from the things he got right (if not necessarily pinning them to the right time). Heinlein goes into great detail describing "Drafting Dan"—a way to automate drafting, so that an engineer can design without hunching over a drafting table. And what he describes is pretty much AutoCAD, only about a decade and a half too early. He describes Roombas. He places them nearly three decades too early, but the physical description of the way they will ensure that a whole room is vacuumed and then return to their charging stations is uncanny. One thing he got wrong, but it just goes even further to demonstrate his vision. In 2000, he postulates that, for some reason, gold has become very cheap. This leads to a great deal more automation, because all his robots need a lot of gold (perhaps not individually, but certainly in total) and with higher gold prices it becomes cost prohibitive. The prices of gold, platinum, and numerous other metals do in fact currently limit a great deal of our technology. I recently finished The Man who Folded Himself, a time travel story that's all about paradox. Heinlein takes a different view (and one that, failing actual experimentation, must be just as likely): 'But I'm not worried about "paradoxes" or "causing anachronisms"—if a thirtieth-century engineer does smooth out the bugs and then sets up transfer stations and trade, it will be because the Builder designed the universe that way…. He doesn't need busybodies to "enforce" His laws; they enforce themselves. There are no miracles and the word "anachronism" is a semantic blank.'  Heinlein's idea of time travel is that you can't do anything that you haven't already done. "Free will and predestination in one sentence and both true". I've been trying to wrap my head around this idea, possibly even before I first read this story: I remember arguing with Calvinists as a teenager, who insisted that everything was predestined, but that we still had complete free will.  It's actually easier to believe in time paradoxes!  Anyway, this particular story probably doesn't deserve the 5-star rating. I use that for life-changing books, and in Heinlein's case, that is probably The Roads Must Roll, but somewhere over the decades I lost that book so I can't reread it unless  I find another copy. This one certainly has similarities and can stand in until I find another copy of The Roads Must Roll!

Maree ♫ Light's Shadow ♪

The first time I read this book was years ago at the suggestion of a boyfriend and I don't know if that colored my opinion of the book or what, but I thought it was merely okay/didn't really like it. But in rereading, I find I have a much better opinion of the book and I'm not sure if it's just that I understand it better, having had that first experience, or if my tastes have changed since then (in boyfriends as well as books ;).The Door into Summer is a classic time displacement novel and I very much enjoyed how it doesn't follow the standards of today by throwing someone years into the future or past and having them experience life in a changed society. Society doesn't change too much for Dan, aside from the invention of all sorts of wondrous things that he himself seemed to have a hand in making. This is a science fiction story, yes, but it's all based on human interaction and emotion and take place within the span of 30 years. The reasons for Dan's traveling through time are for those reasons, not for exploration of and old or new century, which is a refreshing take on it, even though this is a rather old story.You don't want Dan to succeed because he's a great character, because really, he's not much. But his circumstances and the story are what propel the reader into sympathy and rooting for his success.

Alice Lee

My first Heinlein, wasn't impressed. I heard some random dude on the bus one day loudly singing its praises and it piqued my interest, since Heinlein was an author I intended to try out anyway... Maybe this just wasn't the best first book to read. I'm thinking of trying Stranger in a Strange Land next; if that is another fail then, oh well, another author I don't care for.


This is the first Robert Heinlen book I have read. I am not normally a fan of first person perspective but Heinlen's prose is breezy and fun channelling the voice of the protagonist, a 30 year old inventor about to be embroiled in an adventure through time. The first couple of pages was the most endearing introduction I've read in a while. While the rest of the book doesn't quite live up to that start, it is still a thoroughly engaging time travel adventure told with much old fashioned charm and splendid vision. The story is set in the 1970s and the beginning of the 21st century. As the book was written in the 50s, its both fascinating and charming to read the author's vision of the future (ie our recent history), politically, technologically and socially. There are a couple of nice technological predictions that eventually came true in a way but otherwise we might as well treat the story as a vastly different alternative timeline to what we are familiar with.The dialogue is snappy and entertaining and the story moves along briskly, not meandering too much on details. While the story is clever and entertaining, it is unfortunately very predictable in how it will all end from quite early on. Furthermore, the last act had no sense of urgency and thrill. There is a missed opportunity to make this a thrilling finale but it just leisurely ambles its way to the predictable conclusion.I also felt some dissatisfaction on a couple of primary character's closures but that comes down to the drawback of telling a story in the first person perspective. There is one very controversial element or rather ethic in this book which I did feel incredibly uncomfortable with. I cant unfortunately say what it is but it may certainly make you feel uncomfortable too. Again, this is a different era where society were honed in a more un-pc mentality at the time.Another thing that wont please the modern PC abiding readership is the typical 50s stereotype of women. Either the very manipulative type or the overly submissive to men are featured in their full glory here. You have been warned. But the biggest star of the novel for me was a cat called Pete, whom Heinlein gives more character and depth than the supporting human characters. I dont even like cats but Heinlein's brilliant writing has converted me into a cat lover. Pete is awesome, I will in time forget all of the other characters, even the main protagonist but I wont forget Pete the cat.So to sum up, this is an endearing and breezy time travel journey, no big twists just a very pleasurable ride but a missed opportunity to inject more excitement for the final act.I give this 3.5 stars.


Oh, 1950s science fiction - is there nothing you can't do?One of the downsides to our modern information age is that we have so much information available to us. If I see a reference on a blog or in a book that I don't know, it's a quick hop over to Google or Wikipedia to find out what it is, and if it's really interesting I can find myself learning about something I never knew before. And so, if I want to know more about cold sleep, robotics or time travel, there's a whole host of ways that I can not only learn about it, but learn why it's just so hard to do. I mean, think about robotics - we've been looking forward to the perfect household robot for decades now. One that can cook and clean and do all those tiresome chores that we would rather not spend our time doing. The problem is that those tiresome chores are actually marvelously complex tasks, involving not only precise physical movements, but some very complicated judgment calls. Every time we figure out how to get a robot to do one of those things, we then have a hundred other things that need to be done to get it even close to human-like competence.I know this because the internet knows this.But back in 1957, this stuff was all new and fresh and unknown, so if Robert Heinlein wanted his main character to cobble together the perfect household robot with some off-the-shelf parts and a little bit of magic tech (the Thorsen Memory Tubes), then why not? Assuming we had the technology, what couldn't we build?Thus is the set-up for The Door into Summer, an adventure in engineering, patent law, and economics, with a little bit of time travel thrown into spice it up. Our hero, Daniel Boone Davis, is an engineer of the purest sort - he got into engineering to solve problems, and that's what he does. He doesn't want to be just one guy working on one cog for a huge corporation; he wants to make things himself that he knows will benefit everyone. He's a real Populist Engineer, too - his creations are made with replaceable parts, specifically so that the owner can quickly deal with any mechanical problems themselves, rather than have to wait for a repair shop to do the work. The parts are all off-the-shelf, too, which not only makes the machines easier to produce, but makes the production cost lower. In other words, he's making machines that will benefit as many people as possible, and the first one is the somewhat misogynistically-named Hired Girl.This machine (which is a very close approximation of the Roomba, by the way) becomes an instant success, and the company that Dan forms to take care of it is looking to become fantastically wealthy. Unfortunately for Dan, his business partners - Miles and Belle - are far more interested in becoming filthy rich than helping mankind. So when it looks like Dan's newest creation, an all-purpose household robot named Flexible Frank, is going to be a wild success, they manage to freeze him out of the company. Literally. They steal his inventions out from under him and force him to take the Long Sleep - to be frozen cryogenically for thirty years. He wakes up in the year 2000, without money, without a job or prospects, and without his beloved cat, Pete.A word about the cat angle to this story - if you're a cat person, like me, then the relationship between Dan and Pete will really resonate with you. Its clear that Heinlein himself was a cat person, as he shows a wonderful understanding of the human-cat relationship, including the absolute uncertainty as to which one is in charge at any given time. While the cat is not absolutely necessary to the plot, it's a nice addition to the story. If you're not a cat person, well... you should be.Anyway, in the wild future of 2000, Dan discovers that something very strange was going on around the time he got frozen, and the more he uncovers, the more it looks like there can be only one explanation - time travel!This is really classic science fiction at its best. The narrator is a brilliant man who never meets a problem he cannot solve, at least not eventually. He's a certified genius, and were it not for his blind spot for pretty women and his trust in his business partner, he would have had a fantastic life as an inventor. But his love of making stuff gets in the way of how the real world works, and sets him up for a series of thefts and betrayals. But you never really worry about him, because he is a man with no uncertainties. He doesn't wallow in self-loathing and moral dismay when he encounters a problem like being thirty years in the future with no means of supporting himself. No! When he sees a problem, his first thought is, "How do I solve this?"In other words, he's an engineer.It's a remarkably optimistic book, too. While the future of 2000 isn't perfect, it's still a whole lot better than 1970. And while 1970 certainly isn't perfect, it's a whole lot better than 1957. The book rests on that wonderful mid-century assumption that while human innovation can't solve every problem (and indeed often succeeds in creating more problems), it is, in the long run, a force for good. For the modern reader this may seem terribly naive, but I found it refreshing.So while the story is really pretty predictable, it's a fun ride. Even the time travel element isn't quite as risky as Heinlein tries to make it out to be, since the reason Dan opts for time travel is that he's found evidence that he's already done it. Therefore no matter how dangerous it might be, he knows for a fact that he'll be successful. He doesn't mention this, or even seem to notice it, but the sharp-eyed reader should pick it up pretty quickly.While most of the driving force of the book is what I would normally consider pretty boring - patent law and engineering - there is one element to it that is distinctly Heinlein: the universality of love. Dan is done in by his belief that he loves Belle, who turns out to be a gold-digger of the lowest order. But in the end, Dan knows who he truly loves. The only problem is that she's an eleven year-old girl. Whether in the publication year of 1957, the year Dan starts in, 1970, or the far-flung future of 2000, a grown man marrying a pre-teen is something that is generally frowned upon. They're able to settle this problem with a little time travel/cryogenic jiggery-pokery, but when you stop to think about it, the situation can be somewhat... unconventional. If you stop to really think about their relationship, there's some strange moral ambiguity going on there. Fortunately, the characters don't really care and the book ends without going into the ramifications of what they've done.The book isn't about moral complexity, though. It's about solving problems and finding happiness, no matter what you have to do to get it. It's about overcoming adversity, betrayal and even time itself to get the life that you know you deserve. It's about finding that door into summer, when all the other doors lead you only into the winter. While we may not be able to solve our problems quite as neatly as Dan Davis did, we can still follow his example.Except, perhaps, with the romancing eleven year-olds. That's still not cool.

Lance Greenfield

I really enjoyed this book from beginning to [almost] end. The reason for the "almost" will become apparent. The story of time travel by various means was excellent. When reading this story, you should remember that it was written in the 1950s. Some of Heinlein's predictions are amazing, and some are way off the mark. It's amazing to follow his line of thinking though.You can see an outline of the plot in the description. It is fairly predictable, but that didn't detract from my enjoyment of the story at all. It was fun, and it was refreshing to read such innocent prose.Although some people might be offended, there was some narrative that would be considered non-PC these days, but was just part of life in the 'fifties. I actually found that quite refreshing too. I get so irritated by the over-sensitivity to political correctness these days. You can't even tell a good Irish joke, or drop your pants in a US bar to proudly show off your British tattoo, these days, without drawing comments from the puritans.The story was great right up until the final chapter. This was a bit of a damp squib, Heinlein felt that his hero had to justify and explain his actions and how several instances of himself could coexist. I would have been far more satisfied with the explosive ending which could so easily have been there.Having said that, I would strongly recommend this book to all lovers of time travel and sci-fi books.

S.c. Jensen

I didn't read this book with the intention of writing a review, so you'll excuse me if I don't go into great detail. Let me just summarize "the feel" of the book...It is not very often that I read a book that makes me smile the entire time I'm reading it; this is one of them. From the hilarious anachronisms of the 1950's Futurist to the brilliant side-kick cat, Pete. (Cat lovers will appreciate this book on a completely different level than other readers). I was laughing out loud at least once every 20 pages or so.It is only because I read some of the other reviews for this book that I felt the need to write a review myself. After seeing that a number of reviews that charge The Door into Summer (and sometimes Heinlein himself) as being both misogynistic and perverse, I felt the need to defend it (and him).First of all, on the complaints that Heinlein's vision of the future (from 1956, remember) is sexist, misogynistic, anti-woman, etc.:There are not many women in this story, true enough, which may be a mark against it in and of itself. Because of this, the heinous Belle stands out as being a particularly unlikable femme-fatale. Though I would argue that, had Belle not been foiled by Dan's foray into time travel, her plot would have succeeded and she would have made a respectable villain. She was well-equipped for it: calculating, edgy, violent, and un-emotional. But because the other women in the book (Jenny Sutton, the Girl-Scout Matron, and later Ricki) are fairly minor they do little to offset the influence of Belle and rather support the 1950's housewife stereotype. And Dan Davis' engineering vision of rescuing women from the drudgery of housework is a little dated, to be sure.However, I consider these to be the faults of a novel written in the 1950's. I always find it best to approach a book with the understanding that it is a product of the time in which it was written. If a novel breaks through the conventions of its time, great! But it would be unreasonable to expect it every time one picks up a new book. Our modern sensibilities might be offended by some archaic ideas, but out-dated notions don't necessarily devalue an otherwise good yarn. (not to mention historically important works)It's true that science fiction often pushes boundaries: of politics, religion, war, gender, sexuality, human nature, etc. But it is not necessary. And it is certainly not necessary to push all of them at once. The Door into Summer is not a book about gender roles. It reflects opinions common to the time in which it was written, but it does not address them specifically. It cannot be said to be particularly forward thinking on the subject, but at the same time it is a passive position. Heinlein is not actively or purposefully oppressing women in this novel, but he is describing a world very similar to the one in which he lived. Which, for me, is enough that I didn't hate the novel for its faults.Heinlein has shown in this and other novels that he is not rigid in his notions on the future of gender roles. In Starship Troopers women make the best fighter pilots because of their superior reflexes and mental dexterity. In this novel, there are suggestions that--outside of the narrative--women are fulfilling more diverse roles than we see them in. Dan Davis, when discussing the merits of his engineering robot 'Drafting Dan', admits that most women don't care much for it unless they are engineers themselves! The offhand nature of this remark is indicative that it is not an alien idea to Dan. Perhaps his housekeeping robot is more liberal-minded than we initially supposed, if it has freed women from the role of housewives to pursue their dreams outside the home. Something to consider, anyways.With that out of the way, I wanted to talk about the so-called perversion of Dan's unconventional (temporally speaking) romance with Ricki. Many people have commented on the "disturbing" nature of the love story sub-plot. And maybe it's because I've recently read Lolita, but I really didn't feel too put out about it. I actually found Dan and Ricki's relationship kind of cute, mostly because Dan falls in love with Ricki because she understands and appreciates his cat--which Dan feels is indicative of the kind of person she is (although she is only a child). It is important to note that there are no overtly pedophilic suggestions in this book, unless the reader supplies them (I'm sure there are those who will disagree)When it comes down to it, Dan's romantic feelings towards Ricki are not directed at her juvenile self but at the woman he imagines she will become. It is not unusual, I think, to idealize and idolize romantically (particularly after one has had ones heart broken). Ricki is the only female that Dan has ever felt any connection with, and he values her friendship. It is only after Belle betrays him that he begins to think "if only Ricki were older". Not because he fantasizes about being with a child (obviously, he wouldn't then wish she were older) but because he fantasizes about being with someone he loves and trusts.He cannot even be said to be taking advantage of her childish crush on him. He tells Ricki to wait until she's 20 to decide if she wants to be with him (he is, and will remain, 30). Ricki has 8 sobering years to decide if she still has feelings for Dan once she is an adult, during which he can supply no pressure. Thanks to the invention of suspended animation their love is possible without being creepy!Ok, so that's a longer rant than I intended. But there it is. Thanks for bearing with me if you got this far!


Dan Davies es un ingeniero dedicado a crear robots que ayuden con las tareas del hogar. Siempre anda ideando posibles proyectos en su cabeza, en busca de robots cada vez más perfectos y eficientes. Tiene un socio, su amigo Miles, y una prometida, Belle. Al inicio de la novela se nos presenta a un Dan destrozado y hundido por la traición; está tan desesperado que ha pensado someterse al Sueño Largo, es decir, criogenizarse, durante treinta años (la acción se sitúa en 1970) y despertar en el año 2000.'Puerta al verano' es un clásico de los viajes en el tiempo. Para ser un libro escrito en 1957, Heinlein se las apaña muy bien. No es una novela con grandes ideas, pero sí contiene esos toques de ingenuidad e ilusión de la Edad de Oro de la ciencia ficción, que junto a algunos toques de humor, hacen que pases un rato agradable con su lectura.

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