Original color cover artwork by Gaughan for the 1964 Pyramid Books paperback edition of Three Worlds to Conquer by Poul Anderson, acrylic on masonite, 15.5 x 19.5, showing an action-packed scene in outer space. Framed to an overall size of 17 x 21. In fine condition. Seven years after using this piece on Anderson’s book, Pyramid again selected it to grace a popular cover: Gordon R. Dickson’s None But Man. Both authors were later inducted into the Science Fiction and Fantasy Hall of Fame, both earned the distinguished Nebula Award, and, like Gaughan, both won multiple Hugo Awards during their careers. Created in the era that saw man reach the moon and interplanetary sci-fi reach the peaks of popularity, this is a one-of-a-kind piece of art from one of the genre’s finest illustrators, especially notable for its association with two heavy-hitters in the world of science fiction. Accompanied by paperback copies of both novels on which it appeared. RR Auction COA.