Looking for a specific sci-fi romance book?

A while back I read this book and I can not remember the author or the title. I do however remember some details. It is a sci-fi/fantasy/paranormal romance about a woman who is a demon hunter. I remember in the beginning of the book she arrives at an airport and is attacked. I also remember that she meets and falls for a fireman. She lives in an old converted warehouse. I think the man she likes also turns out to be a werewolf but I can't remember. Thanks in advance.