Paperback
details (USA).(see also: Audible Audiobook)
details (UK).(see also: Audible Audiobook)
details (Germany).(see also: Audible Hörbuch)
details (Canada).(see also: Audible Audiobook)
ISBN: 978-0-441-87941-0
ISBN-10: 0-441-87941-1
Ace Books · 1977