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.
Thirteen-year-old Sammy must call upon her detective skills to solve the mystery when a dog she is watching disappears from a city parade and the owner receives a ransom note.
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.
Twelve-year-old Ellen and her younger brother Corey are excited about their overnight camp-out at the zoo, until they discover that they are locked inside with a desperate escaped convict.
Idaville's secret weapon against lawbreakers, ten-year-old Encyclopedia Brown, assists the police force with ten insoluble cases. Solutions are at the back of the book.
Bradley, Brian, Nate, and Lucy visit a haunted hotel on Halloween, but once inside they realize that they have seen plenty of people going in and none coming back out.
Young Cam Jansen and her best friend Eric spend the day at a local fair where they win two goldfish. But when the goldfish go missing at home Cam must solve the mystery.
When guinea pig Sasspants leaves Mr. Venezi's pet shop to live with Detective Pickles, and hamster-detective Hamisher retires, the other animals must try to solve the case of the missing bookstore cat must be solved without their help.
