I just finished reading Mustaine's biography. While it's very frank, and about what you would expect from a thrash metal veteran like him, it ends on a very positive note, and he makes a very strong statement of faith in Jesus Christ. It's a spiritual journey book, about how he fought and overcame his past through Christ's help. For those not bothered by salty language and very graphic descriptions of the metal lifestyle, it's a highly entertaining read. Uplifting, even.