The Mysterious EarthLester del Rey
Lester del Rey (1915–1993) was an American science fiction author and editor. Del Rey is especially famous for his juvenile novels such as those which are part of the Winston Science Fiction series, and for Del Rey Books, the fantasy and science fiction branch of Ballantine Books edited by Lester del Rey and his fourth wife Judy-Lynn del Rey.
Lester del Rey used these pseudonyms: Philip St. John, Kenneth Wright, Erik van Lhin, Charles Satterfield, Edson McCann, John Alvarez, Marion Henry, Philip James, Wade Kaempfert, Ramon F. Alvarez-del Rey and Cameron Hall.
Lester del Rey. Wikipedia.
Photo: Judy-Lynn and Lester Del Rey at Minicon 8 in 1974. Photo source: Wikimedia Commons.