Amazon recently gave this ebook away for free as a promotion for the sequel Inferno. It was my beach read for spring break this year. It's an okay mystery thriller, but the writing is not terribly good (not that I'm one to judge such things). Actually, it's really not much of a thriller or a mystery for that matter. It's more of a straight forward treasure hunt. One treasure leads you to the next until you get to that final goal. I have no idea why this book was so successful. Maybe the underground Christianity themes impressed people? Not bad, but whatever.