Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.

Earthsea is a fictional realm originally created by Ursula K. Le Guin for her short story "The Word of Unbinding", published in 1964, that became more famous in her novel A Wizard of Earthsea, first published in 1968.
Earthsea was originally created by Ursula K. Le Guin for "The Word of Unbinding" in 1964. It became more famous in "A Wizard of Earthsea" in 1968.