Franklin W Dixon

The robbery of the treasure in the tower proves to be an exciting challenge to Frank and Joe. Frank and Joe attempt to foil a ruthless espionage ring in their effort to sabotage the United States space program.

A series of bizarre events in their home town lead the Hardy Boys on a trail of robbers and kidnappers. Something is amiss in Bayport, the Hardy boys' hometown. First there is trouble in Shantytown, then a strange black craft tries to ram Joe and Frank's boat, the Sleuth. That night the local bank is robbed. And later that same night the young detectives' pals, Chet Morton and Biff Hooper, mysteriously disappear after a masquerade party. Are the...

When the Hardy boys eagerly agree to assist their friend Jack Dodd and his father in locating a family treasure, the two young detectives are unaware of the baffling complications that will arise. The only clue to the long-lost treasure is a cryptic message written by a Pilgrim ancestor. But when Mr. Dodd and Jack are accused of stealing cars and then mysteriously disappear, Frank and Joe are confronted with a triple mystery. Have their friends run...

Based on the 1929 original edition: “The Secret of the Caves”. When Frank and Joe try to help their father locate Miss Todd's missing brother, they find themselves tangled up with a mysterious hermit named Captain Royal.

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.

" 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...

When Joe and Frank Hardy stop a group of ranch hands from stealing the Welch family's prize horse, they are invited to help drive cattle back to the Welch ranch, where they encounter dangerous acts of sabotage.0

When a two-hundred-pound sea turtle goes missing from the Bayport Aquarium, Frank and Joe Hardy investigate, discovering a network of underground tunnels hidden beneath Bayport that is aiding a sinister smuggling ring.

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?...

A criminal that seems to be straight out of a Sherlock Holmes novel is out to get brother detectives Frank and Joe in the sixteenth book in the thrilling Hardy Boys Adventures series. An original Sherlock Holmes manuscript was stolen from the Bayport Museum and now pages keep showing up in Frank and Joe's things: their lockers, menus, even the backseat of their car. It's clear someone is out to frame them. But who could it be? The boys try their usual...