Books like The Seven-Per-Cent Solution
Nicholas Meyer
The Seven-Per-Cent Solution is 237 pages, about 4 hours 21 minutes at 250 words a minute.
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The Silkworm 8.5 h 
The Sinister Trophy 3.6 h 
A Caribbean Mystery 4.1 h 
A Murder Is Announced 4.7 h 
No Plan B 7.0 h 
El Libro Negro de las Horas 7.0 h Bar height shows length. Estimated at 250 words a minute.