Theodore "Eibon" Donald Klein (born July 15, 1947) is an American horror writer and editor.
Klein has published very few works, but they have all achieved positive notice for their meticulous construction and subtle use of horror: critic S. T. Joshi writes, "In close to 25 years of writing Klein has only two books and a handful of scattered tales to his credit, and yet his achievement towers gigantically over that of his more prolific contemporaries".
