Wings of fire: the Dragonet prophecy. Tui T. Sutherland. 2012.

Clay has lived his whole life under the mountain. The MudWing dragonet knows that war is raging between the dragon tribes in the world outside - a war that he and four other dragonets are destined to end, according to the mysterious Prophecy they’ve been taught. The five “chosen” dragonets were stolen from their homes while they were still in their eggs - and hidden away for years - all to fulfil the Prophecy.

But not every dragonet choose freedom over fate….….leave the mountain……and set the dragon world on a course that no one could have predicted.