While celebrating the New Year with a friend, Sammy encounters a mystery involving an elderly neighbor, a pioneer cabin, and a century-old family feud.

When cats begin to mysteriously disappear in Santa Martina, thirteen-year-old friends Sammy and Holly start snooping around town to find out what is happening.

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.

Seventh-grade sleuth Sammy Keyes investigates mysterious happenings at a local art gallery.

Thirteen-year-old Sammy meets a mysterious man who dies of a heart attack after telling her to get rid of the large amount of money he is carrying, leading her to investigate who the man was and how he came to be carrying so much cash.

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.

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

While on her first hiking and camping trip, thirteen-year-old Sammy tries to solve a mystery involving endangered condors while avoiding scorpions, ticks, and embarrassment.