Books like The Floating Admiral
Certain members of the Detection Club, Victor L. Whitechurch, G. D. H, Henry Wade, Agatha Christie, Miles Burton, Milward Kennedy, Dorothy L. Sayers, Ronald A. Knox, Freeman Wills Crofts, Edgar Jepson, Clemence Dane, Anthony Berkeley, Simon Brett, G. K. Chesterton
The Floating Admiral is 309 pages, about 5 hours 40 minutes at 250 words a minute.
12 books to read next
How long each takes
The Pale Horse 4.7 h 
The Tiger in the Smoke 4.7 h 
After the Funeral 4.5 h 
The Man in the Brown Suit 4.2 h 
4:50 from Paddington 4.7 h 
Peril at End House 4.1 h 
Spider's Web 4.7 h 
They Do It with Mirrors 3.8 h 
Nemesis 4.4 h 
Destination Unknown 3.9 h 
The Crime at Black Dudley 3.8 h 
Towards Zero 4.1 h Bar height shows length. Estimated at 250 words a minute.