Discworld: Death (abridged)6 books in series
Mort: Discworld, Book 4 Summary
For Mort however, it is about to become one of the tools of his trade. Henceforth, Death is no longer going to be the end, merely the means to an end. He has received an offer he can't refuse. As Death's apprentice, he'll have free board and use of the company horse. And being dead isn't compulsory. It's a dream job - until he discovers that it can be a love-life killer.