Raven's Heirs

This is a Young Adult Fantasy, set in the magical world of Ytir.
Owain Brecca Morwenna is a young Tiraeg noble who has power over the element of Air. He has been captured by Turkic corsairs, and made to use his Talent in their service. Now he has the chance to escape, and return to his family - and finds that his troubles are only just beginning....
His Uncle Ianto would prefer Owain to remain dead as part of his plot to become Morwenna of Ravenscar's heir - and what did happen to Cousin Peredur? And when Owain finally gets back to Ravenscar, will his mother Brecca accept him? He was deliberately crippled by the corsairs to stop him from running away, and will never be able to walk normally again - which disqualifies him from inheriting her lands, under Tiraeg law.