The Prince of Pleasure and His Regency, 1811-20 - J. B. Priestley
If you like to read regency romances this book might interest you. If you write regency romances or aspire to (like me) then you'll like this book. It's not romantic. It's not frilly dresses and sprig muslin. It gives you the regency world's bare bones. You can dress them up as you like.