Try the series "Wheel of time" by Robert Jordan. it's VERY good and will keep you busy for a while. (It's currently 13 books long with a few more to go. And each book is about 400 - 500 pages.) Don't judge theses books by their covers.
"The wheel of time turns, and Ages come and pass, leaving memories that become Legend. Legend fades to myth, and even myth is long forgotten when the Age that gave it birth comes again. In one age, called the Third Age by some, an Age yet to come, an Age long past, a wind rose on the great plain called the Caralain Grass. The wind was not the beginning. There are neither beginnings nor endings to the turning of the Wheel of Time. But it was a