Janet Evanovitch (think that's how you spell it) has a fantastic series about Stephanie Plum. Each one has a number in the title - e.g. One for the Money - she is now up to number 12 (Twelve Sharp).
Stephanie Plum is a Bond Enforcement Agent in New Jersey.
They are very light hearted 'crime/thriller' stories, and also deal with her love affair/attractions to the two men in her life - Joe Morelli, a cop, and Ranger, an independent agent.
Very frothy, but really entertaining!