Swords of Mars (1971) British by Book Covers: Mars Sci-Fi, Sexy Women Pulp on Flickr.Via Flickr: By Edgar Rice Burroughs. (United Kingdom: New English Library / NEL, 1971) No. 3002, paperback, £0.30. Cover art by Richard Clifton-Dey. Back cover is orange with photo of ERB dressed in his World War II uniform.