Tu Libro de Ocasión is an online bookstore based in Spain, offering a broad selection of second-hand and other books across many subjects and genres. Its catalogue spans art and photography, graphic arts, Asturias, biography, education, geography and travel, history, cooking, science, health, literature, politics and social topics. Readers can browse fiction, including mystery, romance, historical, fantasy and science fiction, as well as poetry, theatre, essays and technical books. The store also lists older books and titles on topics such as music, law, economics, computing, philosophy and religion.

The website features popular products with prices and quick-view options, alongside sections for all products, discounted items, new arrivals and best sellers. Examples include books about Asturias, advertising, cooking, astrology, history and banking. Customers can create an account, manage orders and addresses, and contact the store through its website. Tu Libro de Ocasión also provides delivery, legal and payment information, and invites visitors to subscribe for news and special offers.