Bookshop and Cafe. More than 7,000 books.
Buy / Sell / Exchange. (they might have sold some now, so less than 7,000)
Sell, buy, exchange, more than 7,000 used books in all (many) languages.
Near the Old Market downtown. Open 10am to 6pm
Also, of course, a coffee shop on the sidewalk (and inside) out front.