Dragon Masters 6 Flight of the Moon Dragon

In the sixth book in the best-selling Dragon Masters series, the prime Dragon Stone is in trouble! The Dragon Masters have to save the prime Dragon Stone -or they will lose their connections to their dragons forever! Together with their friend Heru, the Dragon Masters travel to the Land of Pyramids. There, they must follow clues to locate the secret Pyramid of the Seven Dragons. Then they must solve puzzles to reach the prime Dragon Stone hidden inside the pyramid. Will the Dragon Masters find the magic stone? And what has been hurting its powers?