Robert B. Parker's Someone to watch over me
"In the latest thriller featuring the legendary Boston PI, Spenser and his young protégé Mattie Sullivan take on billionaire money manager running a network of underaged girls for his rich and powerful clients. Ten years ago, Spenser helped a teenage girl named Mattie Sullivan find her mother's killer and take down an infamous Southie crime boss. Now Mattie--a college student with a side job working for the tough but tender private eye--dreams...