"September 1991" (over) "First Edition" stated on the copyright page.
The copyright page contains the complete Library of Congress Cataloging in Publication Data including the year of publication (1991), the ISBNs of this trade paperback edition (0-385-24646-3) and the simultaneously published hardcover edition (0-385-24732-X), and the LCCN (91-8274). The record on the Library of Congress for this number gives the wrong price for both editions.
Cover art is not credited and there is no visible signature. The credit here is from Locus1.
