When their peregrine falcon brings down a homing pigeon carrying rubies, the Hardy brothers find themselves involved with kidnappers.
Frank and Joe go undercover to discover why teen seamen on an old fishing boat keep going missing. Is one of the crew responsible?
Teenaged detectives Joe and Frank Hardy uncover a plot to sabotage a ski resort.
The Hardy brothers' visiting Greek pen pal enlists their help in searching for a priceless ancient Greek helmet loaned to and lost by a Hollywood movie company years before.
The search for missing gold takes the Hardy boys to the Yucatan Peninsula where they uncover a second mystery.
The Hardy Boys search for a magician's missing assistant.
Helping in a case their father is working on, the Hardy brothers try to find an informer who has telephoned from a booth in their home town, and are hired by a carnival owner to spot pickpockets.
When television wildlife celebrities Jumpin' Jack and his son bring their menagerie to Bayport Elementary, Frank and Joe are on the case for a boa constrictor that goes missing.
"A cooking competition goes wrong when a storm traps both the Hardy brothers and a criminal on the small Rubble Island"-- Provided by publisher.
The art collector who suspects the Hardy boys of stealing one of his valuable paintings offers them a chance to prove their innocence by hiring them to find the painting and the real culprits.
Their efforts to recover a stolen ancient chess piece lead the Hardy brothers to Hong Kong where they help smash an international criminal organization.
When two suspicious plane accidents occur near an eastern airport, the two Hardy brothers investigate the case and find themselves in greater danger than they anticipated.
In trying to trace a missing will, detectives Frank and Joe Hardy trap a dangerous criminal who is willing to risk all--including murder--for money.