Emil Theodore Petaja was an American science fiction and fantasy writer whose career spanned seven decades. He was the author of 13 published novels, nearly 150 short stories, numerous poems, and a handful of books and articles on various subjects. Though he wrote science fiction, fantasy, horror stories, detective fiction, and poetry, Petaja considered his work part of an older tradition of "weird fiction." Petaja was also a small press publisher. In 1995, he was named the first ever Author Emeritus by the Science Fiction Writers of America (SFWA).