"The Man Who Folded Himself"[0] is one of the best time travel books. It won both the Nebula and the Hugo. While it has consistent rules about time travel, fig

"The Man Who Folded Himself"[0] is one of the best time travel books. It won both the Nebula and the Hugo. While it has consistent rules about time travel, figuring out what exactly those rules are is half the fun of the book. [0]: https://en.wikipedia.org/wiki/The_Man_Who_Folded_Himself https://en.wikipedia.org/wiki/The_Man_Who_Folded_Himself