W & G Foyle Ltd. (usually called simply Foyles) is a chain of book shops with seven locations but is best known for its flagship store in Charing Cross Road, London. Foyles was once listed in the Guinness Book of Records as the world's largest bookshop in terms of shelf area (30 miles/50 kilometres) and number of titles on display.
More information on the Wikipedia page [1].
The website is [2].