Hardcover
details (USA).(see also: Audible Audiobook)
details (United Kingdom).(see also: Audible Audiobook · Audio CD · MP3 CD)
details (Germany).(see also: Audible Hörbuch · MP3 CD)
details (Canada).(see also: Audible Audiobook · Audio CD · MP3 CD)
ISBN: 978-0-399-21512-4
ISBN-10: 0-399-21512-3
Putnam Juvenile · 1988