The Man Who Folded Himself is a 1973 science fiction novel by American writer David Gerrold, dealing with time travel. It was nominated for the Nebula Award for Best Novel in 1974 and the Hugo Award for Best Novel in 1974. The book explores the psychological, physical, and personal challenges that manifest when time travel is possible for a single individual at the touch of a button. References to both the American Airlines Flight 191 crash and the destruction of the World Trade Center Twin Towers, events which did not occur until 6 years and 28 years respectively after initial publication, were added in the 2003 edition.