Librería de Viejo is a charming used bookstore tucked away in Sol Madrid. With its rustic decor and shelves lined with books, it exudes a cozy and nostalgic atmosphere. The store offers a wide range of used books, including classics, contemporary fiction, and non-fiction titles. Librería de Viejo also has a dedicated section for local authors, showcasing the literary talent of Sol Madrid. It's a perfect spot to discover hidden literary gems and support the local literary community.