"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!"--

A series of bizarre events in their home town lead the Hardy boys on a trail of robbers and kidnappers.

Teenage detectives Frank and Joe Hardy investigate a case of counterfeiting.

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 thieves hijack a collection of stuffed animals from a country auction, Frank and Joe Hardy pursue the getaway car and are drawn into a thrilling mystery. The recently acquired interest of their best pal, Chet Morton, in taxidermy as a hobby adds fresh twists to the puzzle. At the same time, the young detectives' father -- famed private investigator Fenton Hardy -- is tracking down an industrial spy ring. Over the Hardys' ham radio, Frank and...

Their efforts to recover a stolen ancient chess piece lead the Hardy brothers to Hong Kong where they help smash an international criminal organization.

The Hardy boys dial a wrong number, get the Pentagon, and suddenly find themselves in a dangerous adventure involving national security.

While searching in Iceland for a missing sailor sought by an insurance company, the teen-age detective brothers uncover a plot threatening the life of a United States astronaut and the secrets of NASA's moon project.

In trying to trace a missing will, detectives Frank and Joe Hardy trap a dangerous criminal who is willing to risk all--including murder--for money.

When the Hardy boys buy a Chinese junk (ship) for a money-making venture, they discover it has a serious flaw.