NCW Libraries

Determined to learn the secret of the old mill, Frank and Joe employ a clever ruse to gain entrance and become trapped. There they unravel two mysteries, one involving a counterfeiting case and the other, a national security case their father is working on.

Joe, Frank, and their friends search the icebound Cabin Island for a missing boy and some stolen medals.

When they journey to Alaska to help a friend who feels his life is in danger, the Hardy brothers find their own lives threatened.

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.

Frank and Joe must stay undercover on the Deprivation house reality show to discover who's behind the continuing "accidents."

When their peregrine falcon brings down a homing pigeon carrying rubies, the Hardy brothers find themselves involved with kidnappers.

The Hardy boys embark on another puzzling mystery when they try to discover who is stealing rare collections of ancient pirate treasure and smuggling them out of the United States.

In solving the mystery of two medallions missing from an inherited curio collection, the Hardys wind up in a desolate area of Guatemala at the mercy of dangerous thugs.

Investigate threats sent by an extremist environmental group -- STEMM -- to the owner of the local mall. These fanatics may resort to drastic measures to protect nearby wetlands. That is, if members of STEMM are really the ones behind the threats ... .