From publisher blurb:
A paranoid warlord, a bitter drow priestess, a power-mad archmage, a sly dwarven assassin - not all the characters in the AD&D game went the way of the heroes.
Villains (beings dedicated to committing evil) are the most dangerous of all foes, and thus the most useful of tools a Dungeon Master has to create a memorable campaign. This book presents the most complete guidelines ever offered on creating villains for role-playing games. Miss this advice at your own peril!