I highly recommend The Chronicles of Thomas Covenant, by Stephen R. Donaldson (SRD).
SRD is one of my favourite fantasy / sci-fi writers because he knows how to build a large world, all the while not going WAY too far in to details, unlike Tolkien.

There are three chronicles, consisting of 10 books:
#1
Lord Foul's Bane
The Illearth War ( Gilden Fire )
The Power That Preserves
#2
The Wounded Land
The One Tree
White Gold Wielder
#3
The Runes of the Earth
Fatal Revenant
Shall Pass Utterly
The Last Dark

You can get some details at: http://theland.antgear.com/
Also, you can find his books at all book stores, as well at WeeBookInn (second hand & trade) or similar.