Books like Madame de Pompadour
Nancy Mitford
Madame de Pompadour is 303 pages, about 5 hours 33 minutes at 250 words a minute.
12 books to read next
How long each takes
Elizabeth and Essex 5.3 h 
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Monica's Story 7.1 h 
Sex with Kings 5.4 h Marcos' Lovey Dovie 4.7 h 
The Romanovs 14.1 h 
Henry VIII 11.9 h 
Elizabeth's Women 8.5 h Victoria & Abdul 4.2 h Empress of the East 6.6 h Bar height shows length. Estimated at 250 words a minute.