Edited by Brian W. Aldiss and Harry Harrison.

Introduction, by Harry Harrison

"Grandpa" by James H. Schmitz

"The Snowball Effect" by Katherine MacLean

"The Edge of the Sea" by Algis Budrys

"Scanners Live in Vain" by Cordwainer Smith

"The Pedestrian" by Ray Bradbury

"The Last Day" by Richard Matheson

"The Holes Around Mars" by Jerome Bixby

"The Star" by Arthur C. Clarke

"Two-Handed Engine" by Henry Kuttner

"The Large Ant" by Howard Fast

"Early Model" by Robert Sheckley

"Sail on! Sail on!" by Philip Jose Farmer

London: Macmillan, April 1976, 219pp., ISBN: 0-333-19001-7, hbk. Jacket: Ken Leeder.

London: Pan, March 1977, 219pp., ISBN: 0-330-25034-5, pbk.

New York: St. Martin's Press, May 1978, 219pp., ISBN: 0-312-18985-0, hbk.

New York: St. Martin's Press, December 1979, ISBN: 0-312-18987-7, pbk.

Kirkus Reviews, 15th February 1978.

Publishers Weekly, 3rd April 1978.

Vector, July 1976. Review by Chris Morgan.