Livraria Lello & Irmão is a bookstore in central Porto, just up the road from the Clérigos Church. This Art Nouveau bookstore is beautiful and worth a visit. JK Rowling, author of the Harry Potter series, also frequented the bookstore when she taught English in Porto and is reported to be an inspiration for her writing. It costs 3 euro to get in, money you get back if you buy a book.
Lello, one of the most beautiful bookstores in the world, merits a visit for its architectural features alone: a neo-Gothic facade, stained-glass skylights and a magnificent double staircase. The 1906 shop sells Portuguese titles, as well as English- and French-language books.