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

שם הספר
Inside the atom isaac asimov
The positronic man
) (1957 19the great sf stories
Your, isaac asimov - A LIFETIME OF LETTERS
Fantastic voyage