Mass Market Paperback
details (USA).(see also: Audible Audiobook)
details (United Kingdom).(see also: eBook (Kindle) · Audible Audiobook)
details (Germany).(see also: Kindle Ausgabe · Audible Hörbuch)
ISBN: 978-0-441-66902-8
ISBN-10: 0-441-66902-6
Ace Books · 1970