  The Square Root of Murder (Professor Sophie Knowles, Bk 1) Author: 68 Book Type: Paperback Publication Date: 2011 |
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![The Quotient of Murder [Professor Sophie Knowles, Bk 4]](https://nationalbookswap.com/pbs/m/02/2702/9780425262702.jpg) The Quotient of Murder [Professor Sophie Knowles, Bk 4] Author: 15 Book Type: Mass Market Paperback Publication Date: 2013 |
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 The Probability of Murder (Professor Sophie Knowles, Bk 2) Author: 36 Book Type: Paperback Publication Date: 2012 |
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 A Function of Murder (Professor Sophie Knowles, Bk 3) Author: 22 Book Type: Mass Market Paperback Publication Date: 2012 |
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