Books like Les Rivières Pourpres
Jean-Christophe Grangé
Les Rivières Pourpres is 409 pages, about 7 hours 30 minutes at 250 words a minute.
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Criminal 8.2 h 
A Blunt Instrument 5.3 h 
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14Th Deadly Sin 7.0 h Bar height shows length. Estimated at 250 words a minute.