Description from Google Books:

Clay and his friends have grown up under a mountain, secretly raised by the Talons of Peace to fulfill a mysterious prophecy. The five young dragons are destined to end the war that's been raging between the tribes of Pyrrhia -- but how they'll do this, none of them knows.

Snippet from Google Books:

Determined to end a generations-long war among the seven dragon tribes, a secret movement called the Talons of Peace draws on a prophecy that calls for a great sacrifice, compelling five appointed dragonets to fulfill a painful destiny ...