Book accessories are items that enhance the reading experience or help with book organization. Common accessories include bookmarks, which help readers keep their place, and book covers, which protect books from wear and tear. Other popular items are book lights for reading in low light and bookends to keep books upright on shelves. Additionally, some readers enjoy using reading journals to track their thoughts and favorite quotes from books. E-readers often come with accessories like cases and screen protectors to safeguard the device. Overall, these accessories can make reading more enjoyable and organized.