A wizard of earthsea
Le Guin, Ursula K. 1929-2018
Paper Book
 Ged was the greatest sorcerer in all Earthsea,  but once he was called Sparrowhawk, a reckless  youth, hungry for power and knowledge, who tampered  with long-held secrets and loosed a terrible shadow  upon the world. This is the tale of his testing,  how he mastered the mighty words of power, tamed...