Succubus Blues by Richelle Mead

This is a book that is definately not for anyone under the age of 16. It has some "sensual" scenes that are amazingly written, but for the appropraite age group. In this story, a succubus by the name of Georgina Kincaid falls into a deadly adventure with a cute human author by the name of Seth Mortenstein. She must face demons, angels, and even new creatures that no one knows what it could be causing trouble. I recommend this to any girl, or guy, who likes to be left wanting more and sitting on the edge of their seat.