Lester del Rey (Ramon Felipe Alvarez-del Rey) (June 2, 1915 - May 10, 1993) was an American science fiction author and editor.
He first started publishing stories in pulp magazines in the late 1930s. Consequently, he is considered one of the original "Grand Masters" of the so-called "golden age" of science fiction, which lasted from roughly the late 1930s to the late 1950s.
He later made his way into editing for several pulp magazines and then for book publishers. He was most successful editing for Ballantine Books with his fourth wife, Judy-Lynn del Rey, and founded a popular science fiction imprint with her at Ballantine, Del Rey Books, in 1975.
Anthology: Best Science Ficton of the Year #1-#5 (1972-1976, E.P. Dutton & Co.)