There's also the classics:
Dune (every series be it by Frank Herbert or his son+friend). Possibly the greatest series I've read if you enjoy in-depth plots and a huge variety of twists and turns.
Alternativley, for a quick read there's the three Diablo 2 books that were released (Legacy of blood, The black road and The kingdom of shadow) all are very good "short" (my short...I get through 200 pages+ a day on average...) books and excellent authors.
Otherwise there's the all famous elder scroll books that can be found in-game on morrowind and the like. There's several novels worth of stories alone in that thing not to mention history, lore etc. Some of it makes a really good read /end geekyness :p