Robert Arthur

In searching for a lost parrot who recites Shakespeare with a stutter, Jupiter Jones' firm of young detectives becomes involved with a missing masterpiece.

The Mystery of the Stuttering Parrot

The Three Investigators search for an authentic haunted house.

The Secret of Terror Castle

M. V. Carey

A statue of a mermaid proves to be a vital clue when the Three Investigators set out to trace a missing child.

The Mystery of the Missing Mermaid

The high pitched scream produced by an alarm clock sets three boys on the complicated and dangerous trail of art thieves.

The Mystery of the Green Ghost

Die drei ??? [Fragezeichen] und der grüne Geist

When Jupiter, Pete, and Bob search for the orgins of a sinister clock with an alarm sounding like a screaming woman, they end up in an abandoned house in Hollywood with an entire room of terrifying clocks. Original.

The Mystery of the Screaming Clock

The three young sleuths solve a case of double identity while investigating the legend of Monster Mountain.

The Three Investigators in The Mystery of Monster Mountain

The Three Investigators, Jupe, Pete, and Bob, are assisted by a Greek youth as they search for clues to a mysterious thief on Skeleton Island, an island once inhabited by pirates. Reprint.

The Three Investigators in The Secret of Skeleton Island

Marc Brandel

The reunion of a group of child movie stars plunges the three young detectives into a case of theft, kidnapping, and false identity.

The Three Investigators in The Mystery of the Rogues' Reunion

A pigeon with a missing toe leads three young sleuths to a group of ingenious thieves.

The Three Investigators in the Mystery of the Two-toed Pigeon

The Three Investigators tangle with a couple of shady producers of horror films when they try to track down a runaway teenager.

The Three Investigators in The Mystery of the Creep-show Crooks

When an ornery book collector disappears, the Three Investigators break into his secret computer files in search of clues and gradually uncover his mysterious past.

The Three Investigators in the Mystery of the Cranky Collector

Das Gespensterschloss

Die drei ??? und die Geisterinsel

William Arden

The Three Investigators solve a case involving an international gang of art forgers.

Alfred Hitchcock and the Three Investigators in The Mystery of the Shrinking House

Three junior detectives solve a mystery involving a collection of antique busts, a legacy, a strange letter, and a red ruby.

The Mystery of the Fiery Eye

The Three Investigators become involved in witchcraft when they try to rescue a woman from the influence of snake worshipers.

Alfred Hitchcock and the Three Investigators in The Mystery of the Singing Serpent

The three investigators take on two mysteries: the disappearance of an ancient jeweled Japanese belt from a museum exhibit and the strange antics of a group of gnomes around an elderly woman's house.

The Mystery of the Vanishing Treasure

An old trunk involves the three investigators with dangerous criminals seeking a cache of stolen money.

Alfred Hitchcock and the Three Investigators in The Mystery of the Talking Skull

Jupiter, Bob, and Pete dig and flood a small trench on the beach in order to save a stranded baby whale, but when they return the whale has vanished without a trace.

Robert Arthur

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