I read The Man Who Folded Himself by David Gerrold in about 90 minutes. It is short at only about 140 pages and is written in a sort of diary style.
Daniel is a young man living in 1975 L.A. When his uncle Jim, the man who raised him, dies, Daniel receives a box containing a Time Belt. It allows the wearer to move back and forth in time. Daniel starts small, just jumping a few minutes into the future. When he makes a bigger jump and meets himself, he begins to wonder about the nature of time and reality that he's playing with.
i didn't dislike this book but i can't say i liked it either. There were a few plot potholes and i didn't particularly like Daniel. I kept feeling like there was a big error somewhere that i couldn't spot. There are some moments that reminded me of Lost, at least the fifth season with all the jumping about in it. again, not bad, so i will say it's a 4.