Eric by Terry Pratchett

This book tells the story of Eric, a thirteen-year-old demonologist who tries to make a Faustian bargain with a demon to get power over the whole world, the most beautiful woman in the world, and to live forever, but ends up with Rincewind instead. The fulfillment of the wishes (including spoofs of the Aztecs and the Trojan War and the Big Bang [this last could almost have been written by Douglas N Adams]) is pretty funny. I enjoyed the peeks at the Unseen University, Death, and Pandemonium as well. A solid entry in the Discworld series.