Let’s say you found a rare book you want to add to your collection, and the bookseller’s description says it has a bookplate. You might be wondering precisely what a bookplate is, whether it is a newer addition to the book, and how it affects the value. These are all good questions, and there’s not a single answer to any of those inquiries. In all cases where a book contains a bookplate, it depends. We’ll give you some basic information about bookplates to help you understand how these additions to books came to be and how they can affect the value of an object. We’ll also tell you a little bit more about sources for discovering new information about bookplates if you get particularly interested. In the end, you could decide to establish an entire rare book collection around the bookplate, seeking out objects that contain them or seeking out the bookplates themselves.