This Halcyon Classics ebook is Raymond F. Jones' sci-fi classic THE GREAT GRAY PLAGUE. Jones (1915-1994) was a popular science fiction writer of the 1940s-1970s best known for his 1952 novel THIS ISLAND EARTH which was adapted into the 1955 film of the same name.. There is no enemy so hard to fight as a dull gray fog. It's not solid enough to beat too indefinite to kill and too omnipresent to escape.. This unexpurgated edition contains the complete text with errors and omissions corrected.