About the Book: The third thrilling installment of The 39 Clues series comes to life in graphic novel form, packed with action, suspense, and mystery. Amy and Dan Cahill are on a dangerous mission alongside the unpredictable Alistair Oh, tracking one of the most powerful and secretive fighters the world has ever known. With deadly stakes and hidden Cahill secrets, this fast-paced adventure keeps young readers on the edge of their seats.