With an introduction by the editor. Stories: Basilisk (1972) by Harlan Ellison; The Dueling Machine (1963) by Ben Bova; A Man to My Wounding (1959) by Poul Anderson; Commando Raid (1970) by Harry Harrison; Curtains (1974) by George Alec Effinger; Mercenary [Joe Mauser] (1962)by Mack Reynolds; Rule Golden (1954) by Damon Knight; The State of Ultimate Peace (1974) by William Nabors; By the Numbers (1973) essay by Isaac Asimov; To Howard Hughes: A Modest Proposal (1974) by Joe Haldeman.
Used availability for Joe W Haldeman's Study War No More
September 1979 : UK Paperback
June 1978 : USA Mass Market Paperback