BiographyBorn José Mario Garry Ordoñez Edmondson y Cotton.
Although generally called a science fiction writer he also wrote Westerns under the names Kelly P. Gast, J. B. Masterson, and Jack Logan. As he could also speak six languages he did translating work as well. His science fiction career began in 1955 with a story in Astounding. Over the years he produced several novels which gained some note for their interest in time travel and Latin America.