Dink, Josh, and Ruth Rose help catch the thieves who have stolen the treasure from the museum's mummy exhibit.

Bowser is a mutt, just adopted by eleven-year-old Birdie Gaux and her grandmother, but when they all get home to Grammy's bait and tackle shop in the bayou they discover that their prize stuffed marlin has been stolen--so Bowser decides to investigate, and things quickly become complicated and dangerous.

Dink, Josh, and Ruth Rose help catch the thieves who have stolen gold from Sammi's parents, the king and queen of Costra.

Abby Hayes tries to solve the mystery of who at her school is stealing the things which her fellow students value the most.

While organizing an ice carnival to raise funds for her pen pal's school library, Trixie investigates a mysterious problem facing Regan and a run of thefts and accidents in the neighborhood.

A large bundle of money turns up missing at the U.S. Treasury building and KC and Marshall think they know who did it; however, they aren't quite sure how it was done.

Joe and Frank Hardy, undercover agents for ATAC--American Teens Against Crime--travel to Ocean Grove, New Jersey, on an assignment to figure out who is responsible for a rash of jewelry store robberies in the tourist town.

Thirteen-year-old Lady Grace Cavendish, maid of honor to Queen Elizabeth I, describes in her diary how she tries to discover who stole a magical ruby belonging to the visiting princess of Sharakand.