Franklin W Dixon

In the first novel of the classic children’s mystery series, the Hardy Boys’ quest for stolen jewels leads to unexpected danger and adventure.
 
Frank and Joe Hardy can’t let their friend’s father take the fall for the jewels stolen from the Tower Mansion, despite how guilty he looks. But once the teens find the real thief, a master of disguise who had everyone fooled, he dies, leaving behind a cryptic...

In the second novel of the classic children’s mystery series, the Hardy Boys must rescue their detective father when he is abducted by smugglers.
 
Always eager for adventure, Frank and Joe Hardy enter a peculiar old house. But after hearing screams, they leave in a hurry. They believe the house is haunted, until they put the pieces of the puzzle together and realize that the house is connected to their father’s...

Brothers Frank and Joe Hardy and their elementary school friends help them track down what they hope is a treasure after they find a mysterious map.

When Thrill Kingdom has a roller coaster design contest, Frank and Joe help their friend Phil with his model, but on the day of the contest someone ruins their entry and Frank Joe investigate to find the culprit.

Young Frank and Joe Hardy enlist the help of their friends to solve a mysterious case involving a large number of frogs.

Teenaged detectives Joe and Frank Hardy uncover a plot to sabotage a ski resort.

" The Hardy Boys are visiting Paris! Joe is excited to check out all the street art he's heard about. And Frank can't wait to go to all the museums he's researched. On their very first day in the city, the brothers are woken up early in the morning by fireworks. But these are no ordinary fireworks. They are a part of elaborate cover for the heist of a priceless artifact. What's worse, the theft seems to have been orchestrated by Joe's favorite street...

While participating in a Revolutionary War reenactment, Frank and Joe learn that there has been a real casualty and set out to investigate the incident.