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 the Earth's Sun--and of Earth itself.
Only a few know the terrifying truth--an outcast Earth scientist, a rebellious alien inhabitant of a dying planet, a lunar-born human intuitionist 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.
The HUGO and NEBULA AWARD-winning novel.
Isaac Asimov (1920-1992) was one of the most famous, honoured and widely read science fiction authors of all time. Born in Russia but raised in the USA, his career as an SF writer began in 1939 with 'Marooned Off Vesta', in AMAZING STORIES. His output was prolific by any standards - in a career spanning five decades, he wrote more than four hundred books, won six HUGOs, two NEBULAs and the SFWA GRAND MASTER AWARD, among many others, and provided pleasure and insight to millions of readers. He died in 1992 at the age of 72.