Paperback
details (UK).(see also: Audible Audiobook)
details (USA).(see also: Audible Audiobook · Audible Audiobook)
details (Germany).(see also: Audible Hörbuch)
details (Canada).(see also: Audible Audiobook)
ISBN: 978-0-7515-0384-5
ISBN-10: 0-7515-0384-3
Sphere · 1982