Carpet Diem by Justin Lee Anderson
So what if had a magic carpet in your living room that is the final piece of a eternal bet between God and Satan, and their agents are sitting in your living room trying to convince you to hand it over. Then the next day it gets stolen. Carpet Diem feels like an attempt to channel Prachett's Good Omens, as if it were written by Douglas Adams. The book was entertaining and very fun to read.