I recently finished reading this Heinlein treasure for the first time, I've never read his work but I'm aware that he was one of the godfathers of sci-fi writing and the title is well deserved!! This is labeled a "juvenile" series book but his detailed scientific explanations of the properties of relativity and the like made my scalp tingle as they went over my head. Don't judge this book by the campy cover, it's not all technicolor dragon adventures. A recent scientific discovery reveals that certain pairs of twins are linked telepathically, after this discovery several are recruited for space exploration as the telepathic link seems to be simultaneous despite the lightyears of distance. The book centers around a pair of 16 year old twin boys, Pat and Tom, and their journey into adulthood. One twin is left on earth and the other inhabits a flagship on a journey to find new worlds for humanity to expand to and survive all the while staying linked. Though, due to the nature of relativity, time begins to stretch the earth twin aging faster than the space twin, thus forcing him to develop telepathic links with the earth twin's offspring. Heinlein was far ahead of his time, much of the story feels timeless to me, save for a few lapses in technology and social behavior. Many moments stick with me on this book but one thing I found fascinating was that Heinlein commented on the change in language and slang on earth. As the space twin continues to communicates with earth he has difficulty parsing out phrases that his grand niece is using as the vernacular has changed in 60 years. The premise reminded me of the movie Interstellar at times. Overall, I highly recommend this book and look forward to reading more of his work.
What is your favorite piece of sci-fi literature?