Books like An Infamous Army
Georgette Heyer
An Infamous Army is 438 pages, about 8 hours 2 minutes at 250 words a minute.
12 books to read next
How long each takes
Persuasion 4.9 h 
Vanity Fair 12.8 h 
Villette, a Novel 9.9 h 
More Than a Mistress / No Man's Mistress 6.6 h 
The Professor 5.5 h 
Lady Knightley's Secret 5.5 h 
The Viscount Who Loved Me 7.3 h 
Not Just a Wallflower 6.0 h 
Swann's Way 8.1 h 
An Offer from a Gentleman 7.6 h 
Mansfield Park 8.1 h 
Emma 8.4 h Bar height shows length. Estimated at 250 words a minute.