Swords and Deviltry -
Leiber, Fritz
The first book of the series documenting the adventures of Fafhrd and the Gray Mouser...
from Amazon:
Swords and Deviltry introduces us to a strange world where fantastic but thoroughly flawed anti-heroes Fafhrd and Gray Mouser find the familiar in themselves and discover the icy power of female magic. Three master-magician femme-fatales and a sprightly lad illuminate the bonds between father and son, the relationship between the bravado of the imagination, and the courage of fools. A hedge wizard explains the cold war between the sexes. Mouse and Fafhrd meet again and traverse the smoke and mirrors of Lankhmar learning more and more of the foggy world in which they live, experiencing the pleasures and pains of the City of Sevenscore Thousand Smokers that will lead them to countless more adventures and misadventures.
This novel and its sequels are among my all time favorites. *
I just recalled and should add that the chapters that made up this novel were short stories and it wasn't actually written originally in full novel form, if that bothers anyone.
-MJ