Daunt Books in Marylebone: most atmospheric bookstore I’ve ever visited (see photo below) with an astounding selection of books on travel writing, history, and more.
London Review Bookshop in Bloomsbury (one block from the British Museum): small bookstore with an excellent selection of world literature classics, fiction, non-fiction, history, philosophy and more. They have a cafe/cakeshop, too.
Folio Society: If you are looking for beautifully crafted hardbound editions of books such as Pride and Prejudice, War and Peace, The Iliad (translated by Robert Fagles), and Jan Morris’s trilogy Pax Britannica (on the British Empire), the Folio Society bookshop is the place to go. They have hundreds of titles of classics, many of which are illustrated, printed on exquisite paper, with high quality binding.
Foyle’s: Lose yourself in the Foyles flagship at 107 Charing Cross Road which, according to their website, “houses a range of over 200,000 different titles on four miles (6.5km) of shelves – the equivalent of lining one bank of the Thames with books from Battersea Power Station to the Tower of London.”
Strand Books: independent bookstore in New York’s East Village, selling new and used books (including rare books and collectibles).
Tsutaya Daikanyama T-Site: The Tsutaya bookstore complex in Daikanyama, a district of Tokyo, has won architectural awards and its interior is as impressive as the exterior. You will find an extensive selection of foreign and Japanese magazines, Japanese and foreign language books, a vintage LP section, lots of jazz CDs and LPs, a stationery and fountain pen section, and a splendid, beautifully designed restaurant whose walls are lined with books. You can have dessert or lunch at the restaurant and relax in the comfortable chairs.