Listmania!
Uncle Trev's Sci-Fi Tips
Time And Again (Fantasy Masterworks)Time And Again (Fantasy Masterworks) by Jack Finney
Buy used from: £13.92
Time Travel as a state of mind
Bring the Jubilee (Millennium SF Masterworks S.)Bring the Jubilee (Millennium SF Masterworks S.) by Ward Moore
Buy new: £1.50 / Used from: £1.50
Alternate America
Pavane (S.F. Masterworks)Pavane (S.F. Masterworks) by Keith Roberts
Buy new: £2.50 / Used from: £1.95
Alternate England
The Stars My Destination (S.F. Masterworks)The Stars My Destination (S.F. Masterworks) by Alfred Bester
Buy new: £2.46 / Used from: £1.96
An all-time classic. From the Amazon review ...a fast-moving pyrotechnic extravaganza with enough bloodshed for Tarantino and enough social analysis for Marx.
Ender's Game (The Ender Saga)Ender's Game (The Ender Saga) by Orson Scott Card
Buy new: £5.49 / Used from: £1.48
Great ideas and one of the few books to deal with interstellar travel in a realistic-ish way.
All Tomorrow's PartiesAll Tomorrow's Parties by William Gibson
Buy new: £3.35 / Used from: £0.72
A sequel, but that doesn't really matter. Lots of very Gibson ideas and characters
Pattern RecognitionPattern Recognition by William Gibson
Buy new: £5.99 / Used from: £3.81
fascinating Gibson take on more-or-less current times
Snow CrashSnow Crash by Neal Stephenson
Buy new: £5.99 / Used from: £2.75
This is what the internet was supposed to be like
The Diamond Age: Or, a Young Lady's Illustrated PrimerThe Diamond Age: Or, a Young Lady's Illustrated Primer by Neal Stephenson
Buy new: £5.99 / Used from: £2.74
More Stephenson, more great ideas
CryptonomiconCryptonomicon by Neal Stephenson
Buy new: £6.99 / Used from: £2.00
WWII Nazi Gold, unbreakable encryption, rebel offshore data haven and so much more!
The Door into SummerThe Door into Summer by Robert A. Heinlein
Buy used from: £2.95
If Time Travel is a one-way process, how do you get back and try again?