11 Harrowhouse 1988, Penguin Books Ltd, London

ISBN-13: 9780140098310

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11 Harrowhouse 1987, Berkley Publishing Group

ISBN-13: 9780425105627

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11 Harrowhouse 1986, Berkley Books

ISBN-13: 9780425095911

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11 Harrowhouse 1985, Berkley Books

ISBN-13: 9780425076491

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11 Harrowhouse 1977, HarperCollins Distribution Services

ISBN-13: 9780586047743

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11 Harrowhouse 1974, Macmillan, London

ISBN-13: 9780330238762

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11 Harrowhouse 1973, HarperCollins Distribution Services

ISBN-13: 9780233963822

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