In the fourth book of the bestselling Cirque Du Freak series, Darren Shan and Mr. Crepsley embark on a dangerous trek to the very heart of the vampire world. But they face more than the cold on Vampire Mountain-the vampaneze have been there before them. Will a meeting with the Vampire Princes restore Darren's human side, or turn him further toward the darkness? Only one thing is certain-Darren's initiation into the vampire clan is more deadly than he can ever have imagined.