Once Bitten was marketed as a paranormal romance, but I definitely think it should have been labeled with the paranormal/romance/mystery. Do they even have such a category? The romance seemed almost secondary with the mystery of who killed Lucy taking center stage. I found myself questioning the behavior of every character very early on in the book, which made it a real whodunit for me. I enjoyed keeping that mental list of suspects and formulating plausible motives.
Angie spends a great deal of time mentally questioning Eric and the 'vamps' at The House of Usher while searching for the killer. She never really believed he was capable of doing something so terrible, but the thought was always niggling at the back of her mind. All the while she knew she was falling for him and she wasn't sure how to react to that. It wasn't until the end of the book, when Eric was in danger, that Angie realized that he may be a vampire but he wasn't a killer.
What caught your attention most? Did the mystery detract or enhance the romance? Did you figure out the identity of the killer before the big reveal?