can anybody recommend any good si-fi book

You do have Ender's Game, right? :)

I'm currently re-reading 'Eisenhorn' for the umpteenth time - by Dan Abnett. It's based in the Warhammer 40K universe, but don't let that put you off. I never played the Warhammer tabletop game and still thought that this was a fantastic piece of Sci-Fi.

I can recommend a few authors. (modern/newish ones). Orson Scott card has been around forever.

Peter Hamilton
Alastair Reynolds
Richard Morgan

I'd also recommend making an account on amazon (if you don't have one), finding your favourite books, marking them as owned and rating them.
Then go to the book recommendations and see what amazon comes up with, it's surprisingly good once you've tuned it with some likes and dislikes, although it's confused at the moment because I just bought xmas presents and now it thinks I want baby toys.

The Gap Series by Stephen Donaldson

Anything by Iain M Banks

Neil Stephenson's earlier stuff

Vernor Vinge: A Fire Upon the Deep
A Deepness in the Sky

(And also all the Banks, Reynolds, Morgan, McLeod, Hamilton etc.)

Ilium by Dan Simmons.

Saga of Seven Suns books by Kevin J. Anderson. First ones called Hidden Empire.

Originally posted by littleidea
Saga of Seven Suns books by Kevin J. Anderson. First ones called Hidden Empire.

I don't dislike many books, but i'd be doing people a disservice if I didn't say that this is one of the worst books I ever started to read (and I rarely don't finish a book).