If you like the Thieves World books, I heartily suggest the Books Of Swords books by Fritz Leiber. Most of them are out as ebook and are very well written. Info on Leiber and the books can be found in this wikipedia article:
http://inkmesh.com/search/?qs=fritz+...nE=Find+Ebooks
And the ebooks can be found and ordered at this inkmesh link:
http://inkmesh.com/search/?qs=fritz+...nE=Find+Ebooks
Fafhrd and the Gray Mouser series1.Swords and Deviltry (1970). Collection of 3 short stories.
2.Swords Against Death (1970). Collection of 10 short stories.
3.Swords in the Mist (1968). Collection of 6 short stories.
4.Swords Against Wizardry (1968). Collection of 4 short stories.
5.The Swords of Lankhmar (1968) (expanded from "Scylla's Daughter" in Fantastic, 1963)
6.Swords and Ice Magic (1977). Collection of 8 short stories. (Though see Rime Isle below.)
7.The Knight and Knave of Swords (1988) Retitled Farewell to Lankhmar (2000, UK)