When Mr. Hardy disappears while investigating a mystery surrounding a vacant house rumored to be either haunted or an abode for criminals, the Hardy Boys search for the truth.

When the Hardy Boys set out to solve the mystery of their missing chums, they discover a gang hide-out in a cave on an island along the way.

"Now with a brand-new look, this is an edition that collectors won't want to miss! In The Secret of the Caves, the seventh book in the incredibly popular, long-running series, Frank and Joe Hardy discover the secret of the Honeycomb Caves while searching for a missing professor. A special treat for Hardy Boys fans and any reader who's new to the series!"--

"Now with a brand-new look, this is an edition that collectors won't want to miss! In The Mystery of Cabin Island, the eighth book in the incredibly popular, long-running series, Frank and Joe Hardy encounter several dangerous setbacks as they search for Johnny Jefferson and some antique stolen medals. A special treat for Hardy Boys fans and any reader who's new to the series!"--

Now with a brand-new look, this is an edition that collectors won't want to miss! 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,...

Valuable electronic parts containing platinum are being stolen from shipments made by Stanwide Mining Equipment Company's cargo planes, and Frank and Joe Hardy are called upon to assist their world-renowned detective father in solving the case.

Vicious traps and threats beset Frank and Joe as they search for two stolen, famous paintings in an old fort said to be inhabited by a ghost. One of the paintings is a clue to the hiding place of a chain of gold.

The Hardy brothers interrupt their investigations of jewelry-store holdups to answer a plea from their cousin on a New Mexico cattle ranch.

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

Rich girl Lindsay Peyton is throwing the biggest and best Sweet Sixteen bash that Bayport has ever seen. But her party planning is off to a bad start when Frank and Joe discover that someone has keyed her very expensive car--an early birthday present--and has put the mean prank up on YouView.