Books like A Proper Mistress
Shannon Donnelly
A Proper Mistress is 205 pages, about 3 hours 46 minutes at 250 words a minute.
12 books to read next
How long each takes
The Viscount Who Loved Me 7.3 h 
Persuasion 4.9 h 
An Offer from a Gentleman 7.6 h 
Because of Miss Bridgerton 5.6 h 
A Civil Contract 7.2 h 
Regency Buck 6.4 h 
Cousin Kate 5.9 h 
Frederica 7.0 h 
Sprig Muslin 5.3 h 
Say You Love Me 7.1 h 
Cotillion 6.2 h 
The Sum of All Kisses 6.8 h Bar height shows length. Estimated at 250 words a minute.