Books like Midshipman Bolitho and the Avenger
Douglas Reeman
Midshipman Bolitho and the Avenger is 144 pages, about 2 hours 38 minutes at 250 words a minute.
9 books to read next
How long each takes
Lieutenant Hornblower 5.6 h 
Beric the Briton 6.5 h 
The Sea Fairies 2.4 h 
The Life of Nelson 5.7 h 
The Dragon and the Raven 4.7 h 
April Morning 3.7 h 
Puck of Pook's Hill 3.8 h 
Letters from the Lighthouse 5.3 h 
The Shakespeare Stealer 4.0 h Bar height shows length. Estimated at 250 words a minute.