The Deadly sins and cardinal virtues of science fiction Book

Combined edition of: "The Seven Deadly Sins of Science Fiction" "The Seven Cardinal Virtues of Science Fiction" Contents include: The Ugly Little Boy by Isaac Asimov Superiority by Arthur C. Clarke Riding the Torch by Norman Spinrad Jean Duprès by Gordon R. Dickson Divine Madness by Roger Zelazny The Nail and the Oracle by Theodore Sturgeon The Sons of Prometheus by Alexei Panshin The Midas Plague by Frederik Pohl The Man Who Ate the World by Frederik Pohl Galley Slave by Isaac Asimov The Hook, the Eye and the Whip by Michael G. Coney Nuisance Value by Eric Frank Russell Margin of Profit by Poul Anderson Sail 25 by Jack Vance Peeping Tom by Judith Merril The Invisible Man Murder Case by Henry Slesar Whosawhatsa? by Jack Wodhams