The Book Cellar is located in the basement of the Olde Post Office building, next to Sidney Museum. The shop specializes in second-hand military history and biography and ancient and modern war. It also stocks books on aviation, railroads & railways, naval history, transport, heraldry and genealogy, American politics and royalty. There’s a good collection of Churchilliana as well. Collectable maps and ephemera are featured – come in and browse.