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Cam uses her photographic memory to catch a thief disguised as a ghost.

When Dink, Josh, and Ruth Rose visit a dude ranch in Montana, they find themselves with another mystery to solve, this one involving the theft of money from the ranch's safe and of a large gold nugget that Josh had found.

Dink, Josh, and Ruth Rose investigate the theft of a great deal of money from the belly of a nearly life-size Tyrannosaurus Rex model that their friend, Jud Wheat, is using to raise money for a dinosaur museum.

While visiting their friend Wallis and her adopted daughter on Mount Desert Island, Maine, Josh, Dink, and Ruth Rose investigate why three white wolf cubs were stolen, and by whom.

Falsely accused of a robbery at the airport, the Hardy boys turn the tables on the real thieves by nabbing them in the act of committing another robbery.

Dog detective Sebastian helps his master protect a mystery patient at City Hospital, at a time when an attempted coup has just occurred in a nation friendly to the United States.

When their friend Jack Dodd and his father are accused of car theft and disappear mysteriously soon after, Frank and Joe, who agreed to help them search for a family treasure, find themselves searching for the father and son instead.

After their mother dies, two boys flee their mean aunt and head for Venice, Italy, where they meet Scipio, the mysterious "Thief Lord.

Nancy Drew investigates some suspicious accidents at a friend's newly-purchased inn and uncovers a clever gang of robbers involved in the theft of government property.

Martin and his friends use their detective skills to return a wallet filled with money, and help the police catch a real robber in the process.

Thirteen-year-old Sammy's penchant for speaking her mind gets her in trouble when she involves herself in the investigation of a robbery at the "seedy" hotel across the street from the seniors' building where she is living with her grandmother.

When a gang that uses parties as a cover for robberies victimizes a masquerade party Nancy is attending, the teen-age detective switches identity with her girl friend to solve the case.

An archaeological expedition in the West turns into a desperate attempt to capture robbers and an escaped convict.

Dink, Josh, and Ruth Rose are enjoying Halloween fun in Sleepy Hollow, New York, but when unplanned spooky things start happening, they investigate whether a real headless horseman might be to blame.

When Miss Chinatown and the crown go missing from San Fransisco's Chinatown Parade, Holden--Lily, Miss Chinatown's boyfriend--is accused of the crime.