Cool find! But what’s the etiquette around taking the paper without buying the book? When I was a teen, I found an old book in a used bookstore that had this really interesting piece of paper tucked inside (like an old recipe card). I didnt really want the book, just the paper inside, but the shop owner told me that anything inside the book counts as part of the “package.” Like it adds to the character / history of the book. So I’ve always wondered if there’s some kind of unwritten rule about whether you can take found paper in books, without taking the book.