Mort by Terry Pratchett
I'm on a bit of a fantasy kick right now and when it comes to fantasy, there's very few who are on the same level as Pratchett. He adds a much needed dose of levity and humor to the genre, but not at the expense of proper story structure. He does tend to utilize formula a bit too much, but he makes it up by his imaginative universe and laugh out loud writing style. If you like Douglas Adams then you'll absolutely love this author.