The Sword Thief

The Sword Thief is the third book in the 39 Clues series. The story follows Amy and Dan Cahill, two young siblings who are part of the world's most powerful family. In this installment, they travel to Japan and Korea to find the next clue in the family's secret treasure hunt. Along the way, they encounter dangerous rivals, forge unlikely alliances, and learn more about their family's mysterious past.