Storm of Wings — Chris Bunch

The land between the volatile kingdoms of Deraine, Sagene and Roche is ruled by the sword and by the outlaw. But the schemes of men and nations hold scant interest for Hal Kailas. For him the only true power in the world is that of the dragons.
As a child he loved to climb the high cliffs around his village and watch the dragons nesting there - huge, savage beasts with wings that blackened the sun. His only dream was to grow wings - or learn to ride a dragon.
But when the uneasy peace of the kingdoms is shattered by war, Hal's dream becomes reality. For this is a conflict such as the world has never seen. For the first time, the fearsome wild dragons have become living weapons, ridden by men of cold daring and ruthless ambition.
And the greatest of them is Hal Kailas. Dragonmaster.