Paperback
details (UK).(see also: eBook (Kindle) · Audio CD)
details (USA).(see also: Audible Audiobook · Audio CD)
details (Germany).(see also: Audible Hörbuch · Kindle Ausgabe)
details (Canada).(see also: eBook (Kindle) · Audio CD · Audible Audiobook)
ISBN: 978-0-14-048162-4
ISBN-10: 0-14-048162-1
Penguin · 1980