Books at the brocante are as plentiful as going to the library, the only difference is it outside, noisy, and you never need to return them. Books on every subject exist at the brocante: fashion, religion, history, dramas, dictionaries, and from current authors to authors whose names speak volumes: Voltaire, Racine, Proust, Hugo, Baudelaire... the list goes on. Though I prefer to buy books that are old and usually ones from the 1700s and older. Not because I am going to read them, literally, I like them because of their covers, or the engravings inside, or the deckled pages. I truly judge a book by its cover. Old, pretty, under the market value... yeah it's for me. Brocante dealers in France usually price their books on the subject, not how their covers look. How often I have said, "I buy books for their cover." As the Scandalous book alcoholic, that I am I add for good measure, "I buy them to decorate my bookshelves."
Religious books such as bibles, prayer books, missals... are the least expensive as they are plentiful.
Dominotée and parchment book covers often are the more expensive, and of course, they are the ones that knock my socks off.
Below is a peek of some of my books that reside on a church missal stand that I bought years ago for a decorative purpose only.