Librería de la Casa del Libro is a well-known used bookstore located near the Madrid Royal Palace. This bookstore is part of the Casa del Libro chain, which has a reputation for offering a wide selection of books in different languages and genres. The used section of the store is a treasure trove for book lovers, with affordable prices and a diverse range of titles. Whether you're looking for a classic novel or a contemporary bestseller, Librería de la Casa del Libro is a great place to find your next read.