Pandora's Star was the last book I read, written by a chap called Peter F. Hamilton. Fantastic science fiction book, truly gripping story lines and believable charactors.
If you're into sci fi, get this book, it'll blow your mind. I actually managed to pick it up at my local "The Works" store a while back for something like £2.
Another book, again sci fi, is
Accelerando, by Charles Stross. This one is a bit difficult to get into, as it is very technology orientated in terms of the language used, on the other hand, its available as either in dead tree format, or as a free pdf file. It was through this book that I learned of the Creative Commons licence that my own work, Legacy became licenced under. It proved once and for all that you could give stuff away free, and make a few quid.
If you're looking for classics however, I would suggest that you visit
The Gutenburg Project, which is home to thousands of classic books that are no longer under copyright. Be warned, its a bit of a pig to navigate.