Second Variety - novelette by Philip K. Dick Youth - novelette by Isaac Asimov To Each His Star - short story by Bryce Walton Security - novelette by Poul Anderson Divinity - short story by William Morrison The Hour of Battle - short story by Robert Sheckley Instant of Decision - novelette by Randall Garrett Let 'em Breathe Space! - novelette by Lester del Rey (variant of Let 'em Breathe Space) The Ultroom Error - short story by Jerry Sohl (variant of Ultroom Error) Infinite Intruder - novelette by Alan E. Nourse Collectivum - short story by Mike Lewis The Adventurer - short story by C. M. Kornbluth Decision - short story by Frank M. Robinson Pursuit - novelette by Lester del Rey Exile - short story by H. B. Fyfe Stop Look and Dig - short fiction by George O. Smith (variant of Stop, Look and Dig) The Worshippers - novelette by Damon Knight The Hunters - short story by William Morrison The Ego Machine - novelette by Henry Kuttner and C. L. Moore [as by Henry Kuttner] The Variable Man - novella by Philip K. Dick Ullr Uprising - novel by H. Beam Piper