Dixon, Franklin W

The Hardy Boys investigate when forged versions of valuable comic books are found at a convention in San Francisco.

The Hardy Boys are given clues which send them in search of the treasure hidden by the Outlaw of the Pine Barrens.

Detective brothers Frank and Joe work to solve a muddy mystery when the spring break Mud Bud Run is canceled due to a frog infestation.

"Detective brothers Frank and Joe work to debunk a time travel machine before it's too late"--Provided by publisher.

"Frank and Joe are on a mission to track down a thief ... Bayport Elementary is throwing a fundraiser so they can go on an end-of-the-year trip. Ellie Freeman's parents have volunteered their house for the event, and neighbors have donated all sorts of prizes to be raffled off including movie tickets and gift certificates to Fun World. But the best prize of all is a brand-new ZCross50000, a video game system that every kid has been drooling over. But sometime during the event, the ZCross goes missing."--Provided by publisher.

"Frank and Joe are excited for the school's annual talent show! Frank is working backstage, and Joe is going to show off his sweet juggling skills. Someone keeps playing pranks on all the acts-- bubbles are found in someone's trumpet and someone's music is replaced with the sound of croaking frogs!"--Provided by publisher.

"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 over Bayport. Frank and Joe are determined to shut down the crooks, but after being barreled down by a boulder and nearly squashed by a runaway train, they have to wonder: are they in over their heads?"--Dust jacket.

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.