As the title says, where is a reliable and reasonable place to buy old books? I specifically want the old Arsene Lupin books in French because I speak the language and want to read it in the original format. They were released in the early 1900s, so it’s not super old, but I cannot find them efficiently. Any recommendations?
Do you need a physical copy? Because some are available at https://www.gutenberg.org/ebooks/search/?query=lupin&submit\_search=Go!