1. Remaindered books: This is a term for books that publishers have sold to discount booksellers at a reduced price. These books are typically overstock, older editions, or books that didn't sell well. They may have a small mark or sticker on the cover indicating that they are remaindered.
2. Markdowns: Bookstores often mark down the price of books that have been on the shelves for a while or are no longer in high demand. These markdowns might be indicated by a sticker or stamp on the book.
3. Damage: Sometimes, books may have minor damage, such as a bent corner or a tear in the dust jacket. Bookstores may reduce the price of these books to reflect their condition.
4. Library discards: Libraries sometimes sell off books that they no longer need, and these may have stamps or markings indicating that they were previously owned by the library.
To clarify what you mean, it would be helpful to provide more context:
* Where did you see the term "remainder marks"?
* What type of book were you looking at?
* What was the context of the conversation or text where you saw the term?
Once you provide more information, I can help you understand what "remainder marks" actually refer to in your specific situation.