Books like Why Didn't They Ask Evans?
Agatha Christie
Why Didn't They Ask Evans? is 254 pages, about 4 hours 39 minutes at 250 words a minute.
12 books to read next
How long each takes
The Valley of Fear 3.8 h 
His Last Bow 4.3 h 
Without Remorse 14.1 h 
Dune Messiah 5.1 h 
A Dangerous Fortune 11.0 h 
The Stars Shine Down 7.3 h 
The Lake District Murder 5.9 h 
Corpse in the Waxworks 3.5 h 
Nemesis 6.7 h 
The Red House Mystery 3.9 h 
Mrs. de Winter 7.0 h 
Sundiver 6.2 h Bar height shows length. Estimated at 250 words a minute.