Earthsea is a fictional place made by Ursula K. Le Guin for her short story `` The Word of Unbinding '' in 1964 , but that became more famous in her book A Wizard of Earthsea , first written in 1968 . Earthsea is a fictional realm originally created by Ursula K. Le Guin for her short story `` The Word of Unbinding '' , published in 1964 .