Books like Sidney Sheldon's The Silent Widow
Tilly Bagshawe
Sidney Sheldon's The Silent Widow is 400 pages, about 7 hours 20 minutes at 250 words a minute.
12 books to read next
How long each takes
The Secret of Chimneys 4.7 h 
Echo Park 7.4 h 
The Killing Edge 7.2 h 
All Dressed in White 5.5 h 
At Risk 3.9 h 
The Nature of the Beast 8.2 h 
2666 18.9 h 
The Unexpected Guest 4.0 h 
Joyland 5.8 h 
4:50 from Paddington 4.7 h 
Moonflower Murders 10.7 h 
In My Dreams I Hold a Knife 6.5 h Bar height shows length. Estimated at 250 words a minute.