A book exchange is a system where individuals can swap books they no longer want for books they wish to read. This practice promotes sharing and sustainability, allowing people to refresh their reading material without spending money. Book exchanges can take place in various settings, such as community centers, libraries, or online platforms. Participants typically bring their used books to the exchange and select new ones in return. Some exchanges operate on a one-for-one basis, while others may allow multiple books to be taken for each book donated. This encourages a sense of community and fosters a love for reading among participants.