The gods themselves

The Gods Themselves is a 1972 science fiction novel written by Isaac Asimov, and his first original work in the science fiction genre in fifteen years (not counting his 1966 novelization of Fantastic Voyage). It won the Nebula Award for Best Novel in 1972, and the Hugo Award for Best Novel in 1973.The book is divided into three main parts, which were first published in Galaxy Magazine and Worlds of If as three consecutive stories.