The Shadow of the Wind by Carlos Ruiz Zafón is my favorite book. The family of the protagonist in the book owns a second-hand bookstore in Carrer Santa Anna, 27 in Barcelona. The bookstore doesn't exist, but in that address there's an accessory store (gloves, fans). We talked to the owner, and it turns out that Carlos Ruiz Zafón visited the store and talked to the owner before publishing the book. He used to buy gloves in the store and was inspired by it.
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