Franklin W Dixon

Frank, Joe & Chet received a phone call about a mysterious visitor & are determined to get a picture of him. One man turns up, but then walks away without attempting to knock on the door. A second "visitor" then arrives. He proves to be Philip Dodge, a lawyer that their father knows. He tells the Hardys that his client, a Mr. Brownlee, is searching for his nephew, Williard Grafton, who, along with a friend called Clifford Wetherby, has vanished. The...

In the Northwest Territories of Canada, the Hardy brothers and Chet Morton help to recover a stolen Viking relic.

Frank and Joe Hardy receive an unusual assignment from their detective father. They are to "break into" the house of a Bayport neighbor, Malcolm Wright and retrieve a top-secret invention that the scientist had hidden in his study before leaving for California. The invention is in danger of being stolen and the boys race against time to beat the thieves at their own game. The young detectives soon discover that they are involved in a mystery far

...

A not-so-sweet sixteen...
Rich girl Lindsay Peyton is throwing the biggest and best Sweet Sixteen bash that Bayport has ever seen. is throwing the biggest and best Sweet Sixteen bash that Bayport has ever seen. But when Frank and Joe discover that her car has been keyed, it looks like someone isn't so happy that Bayport's princess is showing off.
Meanwhile, a group calling themselves the Scaredevils is filming themselves committing...

A twig cracked. I snapped my head to the side, following the direction of the sound, and peered through the greenery. There was nothing there.
As I began to turn back around, I caught the slightest motion out of the corner of my eye.
Peeking out between clumps of dense vegetation, about twenty feet away, were two eyes. My skin prickled when I realized that they were staring back at me.

A crooked trail of artistic deception – in Paris!
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,...

Frank and Joe investigate a supernatural crime in the seventeenth book in the thrilling Hardy Boys Adventures series.
One of the Hardys' favorite writers, Nathan Foxwood, has recently died in a tragic car accident. Now, the press is swarming his house in Bayport to get the scoop on the novel he completed just before his untimely death.
When Joe hears that Nathan's wife is having a giant estate sale, he drags Frank with him. Who could pass...

When Frank and Joe join the cast of a new reality show, things starts to go wrong when one of the twelve contestants receives a death threat.

In an effort to recover a top-secret instrument needed by the space program, the Hardy boys travel to South America, hot on the trail of a notorious ring of spies. 

"Determined to learn the secret of the old mill, Frank and Joe employ a clever ruse to gain entrance and become trapped. There they unravel two mysteries, one involving a counterfeiting case and the other a national security case their father is working on"--Container.