The Zombie Knight - Volume One
by George M. Frost
A young man dies, and a grim reaper offers to revive him in exchange for servitude. Responsibilities include saving other people’s lives and occasionally fighting unspeakable horrors. But this particular young man already has a few problems of his own, such as crippling shyness. No, seriously. He can barely even speak to people. It's really bad.
Takes place in the modern fantasy world of Eleg.