A Wizard of Earthsea (Earthsea Cycle, #1)

by Ursula K. Le Guin

It is very hard for evil to take hold of the unconsenting soul.

Every prentice-sorcerer learns the tale of the wizard Bordger of Way, who delighted in taking bear’s shape, and did so more and more often until the bear grew in him and the man died away, and he became a bear, and killed his own little son in the forests, and was hunted down and slain. And no one knows how many of the dolphins that leap in the waters of the Inmost Sea were men once, wise men, who forgot their wisdom and their name in the joy of the restless sea.