ACE

Published by Berkley

An imprint of Penguin Random House LLC

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Copyright © 1969 by Herbert Properties LLC

“Introduction” by Brian Herbert copyright © 2008 by DreamStar, Inc.

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ACE is a registered trademark and the A colophon is a trademark of Penguin Random House LLC.

A shorter version of this book appeared in Galaxy magazine for July–September 1969. Copyright © 1969 by Galaxy Publishing Corporation.

Ebook ISBN: 9781101157879

Berkley edition / September 1975

Ace mass-market edition / June 1987

Ace hardcover edition / February 2008

Ace premium edition / June 2019

Cover design and illustration by Jim Tierney

This is a work of fiction. Names, characters, places, and incidents either are the product of the author’s imagination or are used fictitiously, and any resemblance to actual persons, living or dead, business establishments, events, or locales is entirely coincidental.