What books have you read three or more times?
My list is:
Dune
Hitchiker's Guide to the Galaxy
On the Shortness of Life
Finite and Infinite Games
Antifragile
The Essential Allen Watts
HHG is the only one in our overlap. All the rest of mine are pulp fiction. Apparently I don't reread nonfiction. I think I've re-dipped into bits of Edna Kramer's Nature and Growth of Modern Mathematics though.