Books like Lord John and the Private Matter
Diana Gabaldon
Lord John and the Private Matter is 305 pages, about 5 hours 36 minutes at 250 words a minute.
12 books to read next
How long each takes
A Study in Scarlet Women 7.5 h 
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Lamentation 11.9 h 
Duchess in Love 7.0 h 
Beyond Seduction 9.1 h 
All Quiet on the Western Front 4.6 h 
Four in Hand 5.5 h 
The House of Silk 5.6 h 
Mine Till Midnight 6.8 h 
The Lodger 4.1 h 
The Frozen River 8.2 h Bar height shows length. Estimated at 250 words a minute.