Virgin Planet Poul Anderson USA Galaxy Beacon SF sleaze 1960 vintage paperback

British Gangster and SF books with lurid covers 1950s mushroom publishers as featured in The Mushroom Jungle by Steve Holland A History of Post-war British Paperback Publishing 1874113017 and Vultures of the Void; The Legacy a History of Post War British SF by Philip Harbottle 9781607011491 .