Darren Shan 
Dark Calling [EPUB ebook] 

Events take an unexpected turn in this ninth awesome foray into the worlds of the Demonata…The Disciples are being manipulated by beings older than time. Only Kernel Fleck knows that something is wrong. But he is in the grip of a creature who cares nothing for the fate of humanity. Voices are calling to him from the darkness and he’s powerless to resist.Kernel has already been to hell and back. Now he’s about to go further…