by John Christopher
Paperback
details (United Kingdom).
(see also: eBook (Kindle) · Audible Audiobook)
details (USA).
(see also: Audible Audiobook · eBook (Kindle))
details (Germany).
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details (Canada).
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ISBN: 978-0-7221-2297-6
ISBN-10: 0-7221-2297-7
Penguin · 1988