The Man Who Folded Himself is a 1973 science fiction novel by David Gerrold that deals with time travel.
It was nominated for the Nebula Award for Best Novel in 1973 and the Hugo Award for Best Novel in 1974.

 

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The long-anticipated fourth entry in Carver’s Chaos Chronicles (after 1996’s The Infinite Sea) is space opera at its most agreeably and classically science fictional. Someone or something is plotting murder on an interstellar scale, and a small company of exiles led by human John Bandicut may be the galaxy’s only chance of salvation. The prospective victims are sentient stars living in the Orion Nebula; half the challenge is simply opening communications. Luckily, Bandicut’s allies and sponsors include robots, symbiotes and the incredibly ancient multidimensional entity Deeaab.