The Demonata Series Novels

Dark Calling (The Demonata 9) by Darren Shan
Wolf Island (The Demonata 8) by Darren Shan
Death's Shadow (The Demonata 7) by Darren Shan
Blood Beast (The Demonata 5) by Darren Shan
Lord Loss (The Demonata 1) by Darren Shan
Demon Thief (The Demonata 2) by Darren Shan