"By His Bootstraps" is a 20,000 word science fiction novella by American writer Robert A. Heinlein. It plays with some of the inherent paradoxes that would be caused by time travel.
The Man Who Folded Himself is a 1973 science fiction novel by American writer David Gerrold. It was nominated for the Nebula Award for Best Novel in 1974 and the Hugo Award for Best Novel in 1974. The
By His Bootstraps
…Grandfather paradox The Man Who Folded Himself By His Bootstraps title listing at the Internet Speculative Fiction Database…