In the latest Spenser thriller, the legendary Boston PI and his young protégé Mattie Sullivan take on a billionaire money manager running a network of underaged girls for his rich and powerful clientsTen 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 PI - dreams of being an investigator herself. Her first big case involves a fifteen-year-old girl assaulted by a much older man at one of Boston's most prestigious private clubs. The girl, Chloe Turner, only wants the safe return of her laptop and backpack. But like Spenser, Mattie has a knack for asking the right questions of the wrong people.Soon the two find ties between the exploitation of dozens of other working class girls to an eccentric billionaire and his sadistic henchwoman with a mansion on Commonwealth Avenue. The mystery man's wealth, power and connections extend well beyond Massachusetts - and maybe even the United States. Spenser and trusted ally Hawk must again watch out for Mattie as she unravels a massive sex-trafficking ring that will take them from Boston to Boca Raton to the Bahamas, crossing paths with local toughs, a highly-trained security company, and Spenser's old enemy the Gray Man for a final epic showdown.

Ace Atkins is the New York Times bestselling author of twenty-seven books, including ten books in his Quinn Colson series. Handpicked by the Robert B. Parker Estate nearly a decade ago to continue the Spenser series, he's written nine novels about the iconic private eye. He lives and works in Oxford, Mississippi. Robert B Parker was the best-selling author of over 60 books, including Small Vices, Sudden Mischief, Hush Money, Hugger Mugger, Potshot, Widows Walk, Night Passage, Trouble in Paradise, Death in Paradise, Family Honor, Perish Twice, Shrink Rap, Stone Cold, Melancholy Baby, Back Story, Double Play, Bad Business, Cold Service, Sea Change, School Days and Blue Screen. He died in 2010 at the age of 77.