Becky and her brother use some ingenious clues to identify the person who stole five children's books from the town's library.

A chance meeting with a stranger on the road provides the Hardy brothers with a clue to a gang of local burglars.

Three children vacationing on Pirate Island discover a long-lost family "treasure."

Fifth-grader Cam uses her photographic memory, with help from her friend Eric and his twin sisters, to solve the mystery of Poochie, a famous can

When he finds a torn piece of paper with only part of a word on it, boy detective Nate sets out to find the missing pieces.

When the quarters which Arthur has collected for Mrs. MacGrady's charity drive disappear, Buster attempts to solve the mystery and prove his frie

Nate the Great investigates the mysterious disappearance of the purple plastic octopus that his baseball team uses for second base.

At an old library, the Alden children discover a boy who needs their help and a stranger who is after a valuable object they found in the library

Fifth-grader Cam Jansen uses her photographic memory to help find a pickpocket at the circus.

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

When two suspicious plane accidents occur near an eastern airport, the two Hardy brothers investigate the case and find themselves in greater dan

The solutions to ten mysteries solved by Leroy "Encyclopedia" Brown are given in a separate section challenging the reader to match wits with the