Frank and Joe unravel two mysteries, one involving a counterfeiting case and the other concerned with a national security case their father is working on.

The Hardy brothers try to find out who is behind a rash of automobile thefts that are occurring on Shore Road just outside of Bayport.

On an ice-bound, snow-covered island, Frank and Joe attempt to solve the mystery of a boy's disappearance and the theft of a priceless collection of antique medals.

"Nancy and her friends find themselves at a haunted inn with a mystery to solve in this thirteenth book of the Nancy Drew Diaries, a fresh approach to the classic mystery series. When Nancy and Bess accompany George to a cousin's wedding in historic Charleston, South Carolina, they end up staying at an old inn near the family's home with the rest of the guests. But when they begin hearing strange noises and witnessing unexplained phenomena at night--they...

"Paul Marconi and his two friends are amateur detectives and find their biggest case when their neighbor wakes up to lawn full of rubber duckies. The kids set out to discover the culprit"--

When thirteen high-value pieces of art are stolen from a secret museum, Calder, Petra, and Tommy are grouped with two new companions to solve puzzles that are complicated by the clever Mrs. Sharpe.

Elementary school detective Moxie McCoy looks for a missing school mascot and a new best friend, with the help of her annoying little brother.

Twins Theo and Alexander, their older sister Wil, and five new friends find themselves at an electrifying manor run by Mister Frank and Dr. Stein.

In 2041 on Moon Base Alpha, thirteen-year-old Dash must solve the mystery of how Lars was poisoned before the base loses oxygen, forcing the colonists to return to Earth.