A contemporary fantasy novel, published after 2000, probably American. I started reading it a couple of years ago but I never finished. If I remember correctly, the gods were either dead, or basically just like kings. Humans could inherit their power through a task or something, but having the power of a god would kill you quickly. I think at the beginning the guy may have just died and was resurrected. I think he's either inherited the power of Bacchus, is out to kill Bacchus, or both.