Introduction by Kingsley Amis. Included stories: The Quest for St. Aquin by Anthony Boucher; The Xi Effect by Philip Latham; The Tunnel Under the World by Frederik Pohl; Old Hundredth by Brian Aldiss; A Work of Art by James Blish; Harrison Bergeron by Kurt Vonnegut Jr.; The Voices of Time by J G Ballard; Specialist by Robert Sheckley; He Walked Around the Horses by H Beam Piper; The Game of Rat and Dragon by Cordwainer Smith; The Nine Billion Names of God by Arthur C Clarke; The Streets of Askelon by Harry Harrison; The Country of the Kind by Damon Knight; The Machine That Won the War by Isaac Asimov; Student Body by F L Wallace; It's a Good Life by Jerome Bixby; Sister Planet by Poul Anderson.