Robert Arthur Books
The Secret of Skeleton Island
The Three Investigators are assisted by a Greek youth as they search for clues to a mysterious thief on an island once inhabited by pirates.
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The Mystery of the Fiery Eye
Three junior detectives solve a mystery involving a collection of antique busts, a legacy, a strange letter, and a red ruby.
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The Mystery of the Silver Spider
Three young detectives travel abroad to solve a mystery involving a silver spider and a political plot that endangers the life of a young prince.
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The three investigators in The secret of the crooked cat
By Robert Arthur, William Arden
Using a clue provided by an unusual stuffed cat, three young detectives investigate the mysterious troubles of an accident-prone carnival.
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The Mystery of the Singing Serpent
The three investigators become involved in witchcraft when they try to rescue a woman from the influence of snake worshippers.
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The three investigators in The mystery of the shrinking house
By Robert Arthur, William Arden
The Three Investigators solve a case involving an international gang of art forgers.
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MYSTERY OF THE DEAD MAN'S RIDD
By Robert Arthur, William Arden
Three young detectives go on a high-stakes treasure hunt in order to restore a fortune to the rightful heirs.
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The three investigators in The mystery of the invisible dog
The three investigators are hounded by supernatural forces as they attempt to recover a stolen sculpture of a legendary wolf-dog.
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