Heywood Hill, (HH), is a bookshop at 10 Curzon Street in the Mayfair district of London.
The shop was opened by G. Heywood Hill on 3 August 1936, with the help of Lady Anne Gathorne-Hardy, who would later become his wife.
For the last three years of the Second World War, while he was in the Army, Lady Anne ran the shop with the assistance of the novelist Nancy Mitford. In 1991, the shop was bought by Nancy Mitford's brother-in-law, Andrew Cavendish, 11th Duke of Devonshire.
As of 2016, the store is owned by Peregrine Cavendish, 12th Duke of Devonshire, and managed by his son-in-law, Nicky Dunne since 2011. The staff of the store has substantial expertise in the location and acquisition of rare books and collections of books. They have the ability to select and acquire a library meeting the bespoke requests of a customer.
Coordinates: 51°30′25″N 0°08′48″W / 51.5070°N 0.1466°W