DAVID McKAY COMPANY, Inc.
NEW YORK

Copyright © 1959, 1960 by Alan E. Nourse

All rights reserved

LIBRARY OF CONGRESS CATALOG CARD NO. 60-7199

Manufactured in the United States of America
VAN REES PRESS · NEW YORK

Typography by Charles M. Todd

Sixth Printing, April 1973

Part of this book was published in
Amazing Science Fiction Stories

Transcriber's note:
Extensive research did not uncover any evidence that the copyright on this publication was renewed.