Franklin W Dixon

There are no streetlights on Farragut Alley, so keeping Gabe in our sights was a little difficult. We followed him down toward the dead end, and then suddenly a door opened to our right, in one of the nondescript retail buildings. I wasn't aware of apartments being inside, but maybe above the stores...
"JOE!" Frank suddenly yelled behind me, but it was too late. A dark shape advanced on us from inside the doorway, and a bag was thrown over my...

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.

Frank and Joe travel to Philadelphia where they intend to prevent an attack on an extreme sports contest called the Big Air Games.

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. 

Frank and Joe Hardy are determined to bring to justice the vicious criminals who kidnapped their father while he was investigating sabotage of a road-building project in the Kentucky wilderness.

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

Frank and Joe investigate after two teenagers are apparently frightened to death at the Undercliff House of Detention, a juvenile detention facility in Connecticut that was originally an insane asylum.

The launching of the Firebird Rocket is endangered when a famous rocket scientist disappears without a trace on his way to the Woomera Monitoring Station in Australia. Assigned to the case, Fenton Hardy tells his sons he needs their help. And Frank and Joe must turn down a request that they find the missing son of a prominent senator. The search for the scientist begins at the Princeton Space Laboratory, where the boys realize they are being hunted...

Frank and Joe investigate a walled estate guarded by savage dogs, where a businessman is hiding in fear of his life.

Frank and Joe investigate the legend of Whalebone Island when they receive a warning concerning a sunken freighter.