Paperback
details (UK).(see also: eBook (Kindle) · CD-ROM)
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details (Germany).(see also: Kindle Ausgabe · Kindle Ausgabe)
details (Canada).(see also: eBook (Kindle) · Audible Audiobook)
ISBN: 978-0-241-96041-7
ISBN-10: 0-241-96041-X
Penguin Classics · 2012