"Dirty Thirty" by Janet Evanovich is the latest installment in the beloved Stephanie Plum series, marking the 30th book featuring Trenton’s favorite bounty hunter. In this adventure, Stephanie is tasked with tracking down a stolen stash of dirty diamonds. The local jeweler, Martin Plover, hires her to find his former security guard, Andy Manley (a.k.a. Nutsy), whom he suspects of stealing the diamonds. Concurrently, Stephanie is also on the lookout for Duncan Dugan, a man caught robbing Plover's store who then jumped bail.

As Stephanie navigates these intertwined cases, her personal life adds to the chaos. Her boyfriend, Joe Morelli, is away on police business in Miami, leaving her to care for his unruly dog, Bob. Meanwhile, the enigmatic and alluring security expert Ranger steps in to help, complicating Stephanie's love life further. Her best friend Lula believes she is being stalked by a mythological demon, adding another layer of hilarity and confusion to Stephanie's already hectic life.

Amidst the action and humor, Stephanie is faced with a critical decision about her future with Morelli and Ranger. The story unfolds with Evanovich's signature blend of comedy, suspense, and romance, keeping readers hooked until the very end.