John McDermott (American artist)

John McDermott (August 30, 1919 – April 20, 1977), also known under the pen names J.M. Ryan and Mariner, was an American illustrator and author noted for action and adventure illustrations. McDermott worked as an in-between and effects animator for Walt Disney Studios and as a US Marine combat artist, before establishing himself as a cover illustrator for 1950s paperbacks and pulp magazines such as ''Argosy'', ''American Weekly'', and ''Outdoor Life''. Under his J.M. Ryan pen name, he wrote the novels ''The Rat Factory'' (1971), a derogatory satire of Walt Disney and the Disney studio; ''Brooks Wilson Ltd'' (1967), on which the 1970 film ''Loving'' was based; and ''Mother's Day'' (1969) about Ma Barker. Under his own name, he novelized director-writer Bo Widerberg's screenplay for the 1971 film ''Joe Hill'', which would be his final published book. Provided by Wikipedia