The robbery of the treasure in the tower proves to be an exciting challenge to Frank and Joe.

Six children help solve the mystery of a missing spyglass that has kept two brothers feuding for years.

"Daily Tombs" newspaper reporter Dirk Bones, who also happens to be a skeleton, investigates when a family of ghosts fears that they are being haunted.

Arthur Conan Doyle's The Valley of Fear (1915) is the fourth and final installment of the Sherlock Holmes crime novels. This work of riveting suspense and intrigue is loosely based on the infamous 18th Century Irish secret society, The Molly Maguires. First published in serial form in The Strand Magazine in 1914 and 1915, this novel brings Sherlock Holmes face-to-face with the evil Professor Moriarty, one of the most nefarious characters of crime...

The Alden children find an unusual mystery when they spend a vacation on a supposedly deserted South Seas Island.

The mysterious disappearance of a reclusive neighbor's cat involves the Boxcar children in some complicated detective work.

Presents the adventures of a young boy raised by the animals in an Indian jungle. Includes illustrations and extended captions providing background information on history, geography, social customs, animals, architecture, literature, and science pertinent to the story.

Eccentric Aunt Jane needs help on her ranch so the Aldens, affectionately known as the boxcar children, get help from a private detective.

Amateur sleuth Nancy Clancy investigates when a prized possession disappears from the school.

A friendly writer with a metal detector, the mysterious inhabitants of a tower house, and the discovery of a locket in the sand are ingredients for the Aldens' latest mystery.