The Thin Executioner, by Darren Shan

 This book was an incredible book beyond describing. The entire book was violent and gruesome. Enough to give you nightmares, but even though it has violence I recommend this book highly. There isn't one part I didn't like. It also had one of the best intros and conclusion I've read. A definite must read. Visit the author at http://www.darrenshan.com/