Time for the Stars

Time for the Stars is a science fiction novel by Robert A. Heinlein published in 1956.

Synopsis

The Longrange Foundation is testing twins for telepathic ability, so they can help spaceships communicate over interstellar distances. A young man with such ability signs on as crew, along with his uncle (a military man). The trip is fraught with problems as trivial as an annoying roommate and as serious as mutiny.