This Island Earth is a 1952 science fiction novel by American writer Raymond F. Jones. It was first published in Thrilling Wonder Stories magazine as a serialized set of three novelettes by Jones: "The Alien Machine" in the June 1949 issue, "The Shroud of Secrecy" in the December 1949 issue, and "The Greater Conflict" in the February 1950 issue. These three stories were later combined and expanded into the 1952 novel This Island Earth. It became the basis for the 1955 Universal-International science fiction film also titled This Island Earth.

Raymond Fisher Jones was an American science fiction author. He is best known for his 1952 novel This Island Earth, which was adapted into the eponymous 1955 film.