Sherrilyn Kenyon 
Inferno [EPUB ebook] 
Number 4 in series

The world has fallen in love with Nick Gautier and the Dark-Hunters. Now Nick’s saga continues in the next eagerly anticipated volume . . .Turning sixteen isn’t what Nick Gautier thought it would be. While other boys his age are worried about prom dates and applying for college, Nick is neck deep in enemies out to stop him from living another day. No longer sure if he can trust anyone, his only ally seems to be the one person he’s been told will ultimately kill him. Those out to get him have summoned an ancient force so powerful even the gods fear it. As Nick learns to command and control the elements, the one he must master in order to combat his latest foe is the one most likely to destroy him. If he is to survive this latest round, he will ultimately have to sacrifice a part of himself.