I am really into Robert Jordan's Wheel of Time series at the moment.
I will disagree with others though - I have been rivetted to the entire series, and felt it kept the pace up right the way through (I started book 1 at the end of May and have just finished book 8 - currently waiting for book 9 in Paperback).
Also, someone mentioned Watership Down by Richard Adams - this is a fantastic book! "But it's about a bunch of cuddly bunnies!!" I hear you say!
NO! This is one of the darkest, most sinister and saddest books I have ever read and it says a lot about human societies. The rabbits are some of the most believable characters I've ever come across. Absolutely brilliant - and don't be put off by the film if you've seen it.
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Time is an illusion. Lunchtime doubly so.
Epona of The Laughing Hyenas