Appropriate Genre?

How do you decide which genre is the most appropriate for the Brandon Drake novels? They are called mystery and/or suspense, but they seem as if they could almost as easily be considered among the “romance mysteries” or the “erotic suspense” genres.

Fair comment. The definitions are a bit fuzzy. The booksellers like a solid category (or two) from which to choose. Although all of the Brandon Drake novels are mysteries, they seem to fit well into the suspense genre as well.