A Wizard of Earthsea
One of fantasy's foundational texts: the wizard-school template Rowling inherited, the equilibrium-based magic system half the genre uses, and a Jungian moral architecture that still distinguishes it from its imitators.
Series Guide
Earthsea
Le Guin's archipelago of wizards, dragons and true names, where magic is language and balance is everything — six books that grow up alongside their readers.