Review From User :
Isaac Asimov rarely wrote about either aliens or sex. In response to critics who complained about these omissions, he wrote a book about alien sex. Rather, a book whose middle third is mostly about alien sex. (Mostly.) The other two thirds of the book tell one of the "purest" and "hardest" science fiction stories I've ever read.
By pure, I mean that there's a single, science-related "what-if," and that the story hinges upon that. (In contrast to, for example, a space opera such as Star Trek, in which there are many imaginary technologies, most of which serve as background, rather than as the impetus of the story. Not that there's anything at all wrong with a good space opera.) The motivator for The Gods Themselves is the question, "what if there were a parallel universe in which the laws of physics were a little different"
By hard, I mean that the science is accurate. Which is not to suggest that this reads like a textbook at all; only that the fiction is grounded in reality, as it should be.
Winner of the Hugo and Nebula Awards.
In the twenty-second century Earth obtains limitless, free energy from a source science little understands: an exchange between Earth and a parallel universe, using a process devised by the aliens. But even free energy has a price. The transference process itself will eventually lead to the destruction of Earth’s Sun – and of Earth itself.
Only a few know the terrifying truth – an outcast Earth scientist, a rebellious alien inhabitant who senses the imminent annihilation of the Sun. They know the truth – but who will listen? They have foreseen the cost of abundant energy – but who will believe? These few beings, human and alien, hold the key to Earth’s survival.