The owner of the best-selling McClure and Magazine was?

The owner of the best-selling McClure's Magazine was S.S. McClure, a prominent publisher and editor in the late 19th and early 20th centuries. McClure's Magazine became known for its investigative journalism and serialized fiction, featuring notable authors such as Mark Twain and Theodore Dreiser. The magazine played a significant role in the development of modern journalism and literary publishing. McClure's innovative approach helped it achieve great popularity during its peak years.