Franklin W Dixon
21) Into thin air
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"When the daughter of Bayport's amusement park owner goes missing, Joe and Frank follow clues to find the girl and determine if her disappearance is related to that of another missing person"--OCLC.
22) The race is on
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Frank and Joe vote to solve the mystery of who sabotaged their friend's election speech in this Hardy Boys Secret Files adventure.
24) Bound for danger
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When new team members are being kidnapped and threatened, Frank and Joe join the basketball team at the request of their principal to uncover the culprits.
29) Trouble Island
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"A cooking competition goes wrong when a storm traps both the Hardy brothers and a criminal on the small Rubble Island"--
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"Frank and Joe are back on Black Bear Mountain, the scene of a previous wilderness adventure and mind-bending mystery. This time, the brothers are checking in on Dr. K, a friend they made during their first trip. Dr. K is a fan of living off the grid, but he's been MIA long enough to cause worry in the small mountain town. And so the teenage detectives Black Bear Mountain relied on before have been called in to help once again. It's not a good start...
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Bayport High's Green Environment Conservation Club is camping on Black Bear Mountain, but the bears aren't the only danger--rumor has it that a madman with a taste for human flesh lurks in the nearby forest. When the campers awake one morning to find a bear roaming the campsite, they also find that their teacher is missing ... and blood is streaked across his tent. Frank and Joe go in search of him, but can they survive the dangers on the mountain?...
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In their motorboat the Sleuth Frank and Joe Hardy search Barmet Bay for a dangerous stranger who has stolen a valuable boat. Suddenly, in the eerie fog, they spot the craft drifting aimlessly out to sea. What happens next starts the young detectives and their pal Chet Morton on an intriguing adventure that takes them to Mexico and into the comparatively unexplored desert and mountain regions of Baja California.
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When a sinkhole opens up and swallows one of Bayport's historic statues, Frank and Joe suspect something--or someone--shady at play. They jump at the chance to investigate ; Joe as a member of an urban exploration club, and Frank as photographer for the school paper. But in the thick of their search, the boys stumble upon an entire underground city that's been abandoned for years. Now the city is home to a cultish band of criminals who plan to take...
37) Eye on Crime
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After the Hardys' girlfriends are hypnotized at the taping of a daily TV variety show, all seems fine--until they are arrested the next day for robbing a jewelry store. Even more suspicious: this is the second store robbery committed by teens in just two days! Can the boys crack the case and clear their girlfriends' names?
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The Hardys look to put a gang of armed robbers on ice!
Frank and Joe have volunteered to do undercover security work at the Bayport winter festival. Their main assignment is to act as bodyguards for the star performer, Olympic gold medal figure skater David Kennedy. Although put on for a good cause—charity—the festival is soon plagued by bad vibes: Money intended for the local children's hospital is ending up in the hands of...
Frank and Joe have volunteered to do undercover security work at the Bayport winter festival. Their main assignment is to act as bodyguards for the star performer, Olympic gold medal figure skater David Kennedy. Although put on for a good cause—charity—the festival is soon plagued by bad vibes: Money intended for the local children's hospital is ending up in the hands of...
39) Trick-or-Trouble
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THE LOCAL HALLOWEEN CONTEST IS TURNING INTO A REAL FRIGHT FEST!
Bayport citizens are wild about the Merchant Association's new Halloween mystery contest. The prizes for winning include DVD players, a classic motorcycle, a boat, and even flying lessons! It's sure to be the biggest social event of the fall season. When big prizes are up for grabs, though, some people will do anything to win — and it's up to the Hardys to keep the competition...
Bayport citizens are wild about the Merchant Association's new Halloween mystery contest. The prizes for winning include DVD players, a classic motorcycle, a boat, and even flying lessons! It's sure to be the biggest social event of the fall season. When big prizes are up for grabs, though, some people will do anything to win — and it's up to the Hardys to keep the competition...
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A VACATION IN PARIS TURNS INTO AN ATTEMPT TO SAVE THE CITY
Frank and Joe Hardy can't resist an invitation to volunteer with the crew for a soccer match in Paris. They will be working at the same stadium where the World Cup was held a few years ago! From the moment the Hardys arrive, though, strange things start happening. Bleachers collapse during practice, fireworks are tampered with, and the stadium lighting system is sabotaged. The...
Frank and Joe Hardy can't resist an invitation to volunteer with the crew for a soccer match in Paris. They will be working at the same stadium where the World Cup was held a few years ago! From the moment the Hardys arrive, though, strange things start happening. Bleachers collapse during practice, fireworks are tampered with, and the stadium lighting system is sabotaged. The...