“I volunteer with a library friends group and we operate a small used book store. We like these stickers to put on the back of our books to show what dates they are received in the store so we move them on to other sources if they don't sell in a certain time frame. They fit the backs of the books, are easy to put on, and come in different colors so we can shelve several colors in the store at the same time. It's easy to identify the books with a certain color when it's time to remove them from the shelves.”