Books like Mistress by Midnight
Nicola Cornick
Mistress by Midnight is 384 pages, about 7 hours 2 minutes at 250 words a minute.
12 books to read next
How long each takes
Where the Crawdads Sing 7.6 h 
To Seduce a Bride 7.7 h 
Winter Roses 3.7 h 
Scandal 6.1 h 
The Duke's Captive 6.9 h 
The Naked Gentleman 5.9 h 
How To Enjoy A Scandal 6.5 h 
One Sinful Night 6.5 h 
A Scoundrel by Moonlight 7.6 h 
The Viking's Defiant Bride 5.1 h 
Fortune's Rocks 8.5 h 
After You 8.3 h Bar height shows length. Estimated at 250 words a minute.