When the umpire at the baseball game fundraiser is accused of stealing a collection of autographed baseballs, Dink, Josh, and Ruth Rose try to prove his innocence.

Nate the Great and his dog Sludge try to track down Claude's missing Stegosaurus stamp. Includes related facts, recipes, and activities.

Nate the Great solves the mystery of the missing picture.

Dink, Josh, and Ruth Rose investigate a mysterious man in black who Josh believes is a vampire.

Frank and Joe race against time to retrieve a scientist’s top-secret invention before thieves get their hands on it. But the young detectives soon discover that they are involved in a mystery far greater in scope than just safeguarding the invention. When Joe is kidnapped, this incident starts Frank of on a chase that could end disastrously for him and his pals.

A fifth-grader with a photographic memory and her friend Eric help solve the mystery of the stolen diamonds.

Cam uses her photographic memory to identify the person who stole a valuable autographed baseball. When she notices some bones missing from a dinosaur skeleton exhibited in the museum, a young girl with a photographic memory tries to discover who has been taking them and why.

The blatant acts of a lady swindler posing as Nancy Drew arouse the suspicion of friends and local police against the real Nancy.

Nancy Drew must use clues in a dead man's letters to find some unpublished musical manuscripts that will save an old man and his granddaughter from financial ruin.

When someone steals the money the town has been collecting to help the ducks, Josh and his friends try to find the thief.