The Mystery of the Purple Pirate

Alfred Hitchcock and The Three Investigators, No. 10: The Mystery of the Moaning Cave

The Flickering Torch Mystery

The Secret of Mirror Bay

The Hardy Boys Secret Files Collection Books 1-5

The Mystery of the Singing Ghost

Cigars of the Pharaoh (Tintin Young Readers)

The Case Of The Hidden Holiday Riddle (The New Adventures of Mary-Kate & Ashley #44)

Three teenage boys solve mysteries using their intelligence, resourcefulness, and keen observation skills.

The Three Investigators

The story follows three investigators who stumble upon a riddle wrapped up in an enigma—a dead man’s riddle. Their journey leads them to an old, deserted house in Hollywood where an eerie ghost is alleged to wander.

Discover Your Child's Next Read

The Mystery of the Purple Pirate

Robert Arthur, William Arden, 1982

Alfred Hitchcock and The Three Investigators, No. 10: The Mystery of the Moaning Cave

William Arden, 1968

The Flickering Torch Mystery

Franklin W. Dixon, 1943

The Secret of Mirror Bay

Carolyn Keene, 1972

The Hardy Boys Secret Files Collection Books 1-5

Franklin W. Dixon, Scott Burroughs, 2014

The Mystery of the Singing Ghost

Gertrude Warner, Gertrude Chandler Warner, 1992

Cigars of the Pharaoh (Tintin Young Readers)

Herge Au, 1955

The Case Of The Hidden Holiday Riddle (The New Adventures of Mary-Kate & Ashley #44)

Jean Waricha, Mary-Kate Olsen, 2004