Thirteen-year-old Sammy's penchant for speaking her mind gets her in trouble when she involves herself in the investigation of a robbery at the "seedy" hotel across the street from the seniors' building where she is living with her grandmother.

When her history teacher begins receiving death threats and her own name is near the top of the suspect list, eighth-grader Sammy is determined to find the real perpetrator, but she is distracted by her mother's relationship problems, her almost-boyfriend inexplicably avoiding her, and her duties as a reluctant bridesmaid.

A Hollywood actress, who had been competing with Sammy's mother for an important role, is murdered, but thirteen-year-old Sammy and her friend Marissa are on the case.

"When youth sleuth Sammy Keyes travels to Las Vegas to stop her mom from marrying her boyfriend's dad, she never expects she'll learn the identity of her absent father in the process"--Provided by publisher.

"Teen sleuth Sammy Keyes solves a classic locked-room mystery aboard a cruise ship"--Provided by publisher.

While investigating why someone is trying to force people from their homes to expand a recreation center, Sammy is distracted by the lies she must tell to cover an accident she caused, but which was blamed on her nemesis, Heather.

When Justice Jack, a self-appointed superhero, begins trying to track down the missing Mrs. Wedgewod and some stolen cash, the older folks in Santa Martina are delighted but Sammy knows it will be up to her to really solve the mystery.