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: 978-0-441-79741-7
ISBN-10: 0-441-79741-5
Ace Books · 1979