Amy and Dan cross the oceans on the trail of a famous aviator, but they find more than they're looking for. Their enemies are becoming more vicious, and the tru

A Clue found in Japan has Amy and Dan jetting off to Egypt to find out just what's behind the fierce rivalry between the Tomas and Ekaterina branches of the Cah

Could Amy and Dan's biggest enemy be . . . a friend? Book 6 challenges everything you thought you knew about the Clues race. A hint from their parents' past put

The explosive finale to Scholastic's mega-selling series. Throughout the hunt for the 39 Clues, Amy and Dan Cahill have uncovered history's greatest mysteries a