Mort

Mort is the 4th book in newly knighted Sir Terry Pratchett's Discworld series. This one is another in what I'm coming to depend on to be a reliably enjoyable and funny series. I'm looking forward to the next one.

from the back of the book:

In this Discworld installment, Death comes to Mort with an offer he can't refuse -- especially since being, well, dead isn't compulsory.As Death's apprentice, he'll have free board and lodging, use of the company horse, and he won't need time off for family funerals. The position is everything Mort thought he'd ever wanted, until he discovers that this perfect job can be a killer on his love life.

SFReviews called it an "irresistibly goofy bit of fluff". Steven Wu opens his review with this:

Mort is the first Discworld novel I have read that lives up to the series' overwhelming popularity. It is a charming tale, cleverly told, and--at last!--often hilarious.