Flow My Tears, the Policeman Said

J.R.R. Tolkien: The lord of the Rings (lost count) Philip K. Dick: Ubik, Flow My Tears The Policeman Said, A Scanner Darkly, etc. too many to count (many more than twice) William Gibson: everything at least twice Neal Stephenson: Snow crash (three times, I think) Clifford D. Simak: City H. P. Lovecraft: everything at least twice. There is a French compilation of The Dream-Quest of Unknown Kadath, The Silver Key, and Through the Gates of the Silver Key that I've read countless times. I've used two editions and I'm at my third. Maurice G. Dantec: Babylon Babies (three times) Possibly many others.

Philip K. Dick (Ubik, Man in the high castle, Flow my tears the police man said) Frederik Pohl (Gateway, the Space Merchants) Ursula K. Le Guin (The Dispossessed, Left Hand of Darkness) Iain M. Banks (Culture novels) You will find many Sci-Fi treasures by just going through http://en.wikipedia.org/wiki/SF_Masterworks