Edited by Isaac Asimov, Martin H. Greenberg and Charles G. Waugh.

Contents:

• Introduction by Isaac Asimov
• Doorstep by Keith Laumer
• Who’s on First? by Lloyd Biggle, Jr.
• In the Jaws of Danger [Dr. Dillingham] by Piers Anthony
• The Witness by Eric Frank Russell
• The Mississippi Saucer by Frank Belknap Long
• Primary Education of the Camiroi [Camiroi] by R.A. Lafferty
• Tween by J.F. Bone
• Zoo by Edward D. Hoch
• Subcommittee by Zenna Henderson
• Keyhole by Murray Leinster
• Kindergarten by James E. Gunn