The Guardian of Gildain, Book 1: The Snow Dragon

All Clay wanted was to be the youngest boy to make the varsity basketball team. Even though learning magic from his elderly mentor was exciting, he had no idea it had everything to do with his heritage-and his calling-that would make him either the savior of Earth and her symbiotic world Gildain, or their destroyer. His epic journey begins the night his mentor dies and he is thrown into a world of dragons who have altered human history in their attempt to protect the worlds. He must embrace his Snow Dragon heritage and his skills if he is ever to become the Guardian of Gildain.