Books like Busman's Honeymoon
Dorothy L. Sayers
Busman's Honeymoon is 398 pages, about 7 hours 18 minutes at 250 words a minute.
12 books to read next
How long each takes
Thrones, Dominations 6.0 h 
The Sittaford Mystery 4.1 h 
A Presumption of Death 7.0 h 
The 17Th Suspect 7.0 h 
Career of Evil 9.7 h 
The Word Is Murder 7.3 h 
The Murder of Roger Ackroyd 4.7 h 
One for the Money 5.9 h 
"A" Is for Alibi 4.5 h 
After the Funeral 4.5 h 
The Trespasser 9.0 h 
Persuader 8.5 h Bar height shows length. Estimated at 250 words a minute.