Darren Shan 
Blood Beast [EPUB ebook] 

The master of horror returns with another spine-tingling adventure in the fifth title of the Demonata….Grubbs Grady has so far escaped the family curse, but when he begins to experience alarming symptoms at the onset of the full moon, he is scared that the jaws of fate are opening and about to swallow him whole.He has cheated death, defeated demons, moved on with his life. But Grubbs is torn between the world of magic and his wolfen genes. Can he fight the beast inside or will he fall victim to his tainted blood?