The Hardys purchase a Chinese junk to use as a ferry service, in order to make some money over the summer. It soon becomes apparent that others are very interested in the ship.

The handwritten will of a deceased world-traveler is strange and mysterious. Its cryptic instructions are to deliver “the valuable Aztec warrior to the rightful owner, a descendant of an Aztec warrior.” Frank and Joe Hardy have only one slim clue to work with: the name of a complete stranger who can help. Despite the harassments, the threats, and the attacks made upon them, Frank and Joe unravel clue after clue in their adventure-packed search for the living descendant of the mighty Aztec nation which once ruled in Mexico. It takes as much high courage as clever deduction for the young detectives to defeat their ruthless foes and to decipher the fascinating secrets of the strange and mysterious will.

On 8 March 1421, the largest fleet the world had ever seen set sail from China. The ships, some nearly five hundred feet long, were under the command of Emperor Zhu Di's loyal eunuch admirals. Their mission was 'to proceed all the way to the end of the earth to collect tribute from the barbarians beyond the seas' and unite the world in Confucian harmony. Their journey would last for over two years and take them around the globe but by the time they returned home, China was beginning its long, self-imposed isolation from the world it had so recently embraced. And so the great ships were left to rot and the records of their journey were destroyed. And with them, the knowledge that the Chinese had circumnavigated the globe a century before Magellan, reached America seventy years before Columbus, and Australia three hundred and fifty years before Cook... The result of fifteen years research, 1421 is Gavin Menzies' enthralling account of the voyage of the Chinese fleet, the remarkable discoveries he made and the persuasive evidence to support them: ancient maps, precise navigational knowledge, astronomy and the surviving accounts of Chinese explorers and the later European navigators as well as the traces the fleet left behind - from sunken junks to the votive offerings left by the Chinese sailors wherever they landed, giving thanks to Shao Lin, goddess of the sea. Already hailed as a classic, this is the story of an extraordinary journey of discovery that not only radically alters our understanding of world exploration but also rewrites history itself.

Frank and Joe set out to solve another exciting mystery.

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.

Much has been written about the girl sleuth in fiction, a feminist figure embodying all the potential wit and drive of girlhood. Her male counterpart, however, has received much less critical attention despite his popularity in the wider culture. This collection of 11 essays examines the boy detective and his genre from a number of critical perspectives, addressing the issues of these young characters, heirs to the patriarchy yet still concerned with first crushes and soda shop romances. Series explored include the Hardy Boys, Tow Swift, the Three Investigators, Christopher Cool and Tim Murphy, as well as works by Astrid Lindgren, Mark Haddon and Joe Meno.