Franklin W Dixon

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.

While searching for the guard end of a broken saber that will solve one mystery, the Hardy brothers become involved with a gang of bank robbers.

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.

The Hardy boys go to the Pocono Mountains to help a friend of their father find out what is behind the mysterious happenings at Black Hollow. In the process they help their father solve a case involving a ring of thieves.

Frank and Joe are harassed when they try to locate a descendant of the Aztecs.

Obstacles get in their way when Frank and Joe decide they want to buy a Chinese junk and open up a ferry service.

Frank and Joe Hardy suspect that their best friend Chet Morton is the victim of a summer school swindle and offer to help get his money back; while probing a baffliong burglary at the Seneca Indian Reservation in New York State they investigate Zoar College located nearby.

The Hardy boys find the missing deed to an Indians' land, prevent a phony salesman from carrying through a reckless scheme, and help their father solve a top-secret case.

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.

Difficult assignments are nothing new to the Hardy boys, and this one that takes them to the deep South is particularly challenging. Their mission: to vindicate a long-dead Confederate general, disgraced during the Civil War because he was accused of stealing hidden gold belonging to a bank. In a museum exhibiting relics of the Civil War, the brother sleuths find a puzzling clue that may help to clear the general's name and pinpoint the location of...