Librería La Sombra is a small but charming used bookstore in Gran Vía. With a curated collection of second-hand books, this bookstore focuses on quality over quantity. You can find a variety of genres, including fiction, history, and art. The cozy interior and knowledgeable staff make it a great place to discover hidden literary gems. Whether you're a book collector or simply enjoy the thrill of finding a unique book, Librería La Sombra is a must-visit.