Reginald Bretnor (1911–1992) was an American author and editor known for his contributions to science fiction and speculative fiction. Born in Vladivostok, Russia, he later moved to the United States, where he became a citizen in 1934. Bretnor’s works often explored themes of military theory, science fiction, and humor.

He is perhaps best known for creating the “Feghoot” format—short science fiction stories with pun-based endings, compiled in Through Time and Space with Ferdinand Feghoot. Bretnor also edited influential anthologies, such as Science Fiction Today and Tomorrow and The Craft of Science Fiction, which examined the genre’s literary and theoretical aspects.

In addition to fiction, he wrote extensively on military history and theory, including the Future at War series. His writing style often combined wit, irony, and a deep understanding of speculative themes. Bretnor’s legacy includes both his creative works and his efforts to elevate science fiction as a serious literary genre.