I really like my romantic thrillers. If they're a little dark, so much the better.
I enjoyed this story although the hero and heroine ended up having feelings for each other rather quickly.
The hero's 'relationship' with his sister-in-law had a bit of an 'ick' factor, but I think it was actually like the hero noted during the story. I don't think it was a deliberate action on his part so much as inaction due to his own messed up situation.
The major problem I had with the story was that I figured out who the killer was early on. Even before the FBI profiler came onto the scene with her profile of the killer.