Siblings Evan and Jessie must solve the mystery of a missing cherished family treasure while coming to terms with their beloved grandmother's unsettling behavior.

"In the city of the Red Sox and the Red Line someone is leaving roses—red ones, of course—on the bodies of women he kills. For a psychologist named Susan Silverman and a P.I. named Spenser, the case is personal. But Spenser knows it's the wrong man. Because the right one has come calling on Susan—with a red rose in hand."--

Nate the Great and his cousin Olivia are on the case of a runaway turkey, but unfortunately the clues appear to contradict each other.

While picnicking on Squaw Island, Dink, Josh, and Ruth Rose find a hundred dollar bill, and when they return to explore further they find an entire cave full of money.

Frank and Joe solve a dangerous mystery involving a payroll robbery, a mine cave-in, a piano-playing ghost and a booby-trapped helicopter.

Expensive jewels belonging to the captain's house guest, a famous opera singer, are stolen.

When valuable electronic parts are stolen from shipments made by Stanwide Mining Equipment Company's cargo planes, the boys go undercover as employees to track down the thief.

Maggie Baird and the Scottish town of Lochdubh organize a crime wave in order to get Police Constable Hamish Macbeth to return, and they are successful, but Maggie winds up dead when her car catches fire, leaving five suspects; four suitors and her niece.

THE SCHOOL SKELETON
Some sneaky soul has stolen the skeleton from the nurse’s office! The principal promises free aquarium tickets to the savvy sleuths who can track down poor Mr. Bones. It’s up to Dink, Josh, and Ruth Rose to follow the clues and put those old bones to rest.
THE TALKING T. REX
Meet Tyrone the Tyrannosaurus, Green Lawn’s newest–and biggest!–visitor. The kids’ old friend Jud Wheat is in...

When Dink, Josh, and Ruth Rose visit Plymouth, Massachusetts, for Thanksgiving, they uncover a mystery that dates back to the landing of the Pilgrims.