Books like The Fortune of War
Patrick O'Brian
The Fortune of War is 329 pages, about 6 hours 2 minutes at 250 words a minute.
12 books to read next
How long each takes
Passage to Mutiny 6.8 h 
Mr. Midshipman Hornblower 4.7 h 
Sloop of War 5.9 h 
Flying Colours 5.1 h 
Richard Bolitho – Midshipman 3.3 h 
Ramage and the Drum Beat 5.0 h 
Governor Ramage R.N 6.3 h 
To Glory We Steer 7.0 h 
Command a King's Ship 5.9 h 
Stand Into Danger 5.4 h 
Ramage 5.9 h 
Lord Hornblower 4.5 h Bar height shows length. Estimated at 250 words a minute.