Skyward Ascension

A kingdom where magic is outlawed, a tyrant King, hidden magical academies, an oppressed population.
When King Cedric died at the hands of a group of mages, his son, the then Prince Roderick took the reins of the kingdom and with his first decree, banned all magic and magic users from Avondale.
Magic is not picky with who it selects, however. Anyone can have any kind of mana awaken within them at any time, from Gaia's Grace - the earth mana, to the Eternal Flame - fire mana. And when that mana is awakened, its presence is telegraphed by a distinctive glow in the individual's eyes. So the Royal Guard and soldiers of Avondale became well known for their one fear inspiring order: 'Open Your Eyes'.
Book 3:

Theodore awoke in a smoking crater with no memories of how he got there, or even who he was. With no choice but to simply start walking, that is exactly what he did.
Surrounded by dry, arid desert on all four sides, Theodore picked a direction at random and walked until he came to a small farmstead as the desert turned to grassland and eventually forest. This would be where he would take refuge until he would be discovered, and have to try to explain himself, hoping that his story would be believed.
When his memories return, Theodore must face the deeds of his past and choose to fight for the side of the good and just. He must do what he can to redeem himself in the eyes of so many, and fight for the good of all of the people of Avondale.
A Young Adult Fantasy set in the fictional kingdom of Avondale.