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A Question of Proof

Published
Jan 1935
Main Genre
Mystery Mystery
Rating
Pages
338

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Paperback

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Oct 1979 HarperCollins ISBN13 9780060804947 ISBN10 0060804947
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Trade Paperback
Jun 2008 Rue Morgue Press ISBN13 9781601870254 ISBN10 1601870256
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Trade Paperback
Jun 2012 Vintage ISBN13 9780099565352 ISBN10 0099565358
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eBook

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eBook
May 2012 Vintage ISBN13 9781446476017 ISBN10 1446476014
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eBook
Jun 2018 Agora Books ISBN10 B07DQLR7YV
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Audio

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Audible
Dec 2012 Audible Studios ISBN10 B00ASU486Y
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MP3 CD
Jul 2016 Brilliance Audio ISBN13 9781531843274 ISBN10 1531843271
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Audio CD
Oct 2019 Brilliance Audio ISBN13 9781978667471 ISBN10 1978667477
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Large Print

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Hardcover
Oct 1990 John Curley & Assoc ISBN13 9780792704461 ISBN10 0792704460
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