James Noble

When geology-mad Sam goes to stay with her American cousin, Trey, neither of them have any idea what adventures they're about to unleash. They bring together two pieces of The Heart of Light and -whoosh! - they're thrown back into Ancient Greece, where angry harpies and satyrs live. —from publicity material

Geology-mad Sam and her American cousin Trey are the Chosen Ones, destined to save the world from destruction by gathering together the scattered fragments of The Warrior’s Shield. They've already rescued one section of the enchanted shield from the terrifying Medusa, and now learn that the second piece is being guarded by a fearsome sphinx—a creature with the body of a lion, the wings of an eagle and the face of a human. So Sam and Trey must travel to Ancient Egypt, and face mummies, beast-headed warriors . . . and the deadly sphinx itself! —from publicity material

Sam and Trey are tasked with saving the world from total destruction by gathering the scattered fragments of the Warrior's Shield. Their next stop is ancient China, where they need to track down the third piece—fast! —from publicity material