Contents:
Introduction by Kingsley Amis & Robert Conquest
"Killdozer" by Theodore Sturgeon
"The Voices of Time" by J. G. Ballard
"Call Me Joe" by Poul Anderson
"We Would See a Sign" by Mark Rose
"Dreams are Sacred" by Peter Phillips
"Exploration Team" by Murray Leinster
"Fondly Fahrenheit" by Alfred Bester
"The Sentinel" by Arthur C. Clarke
Stories are from 1945 to 1960 - from Astounding, New Worlds, Magazine of F&SF and Avon SF & Fantasy Reader.