A 'book exchange' culture is spreading among MZ generations, where people leave notes, drawings, questions, and other things in the margins of books and then exchange them with others. This is interpreted as a phenomenon where participatory content consumption in the digital age has expanded offline, going beyond simply changing reading methods. Book exchange is a way to directly record impressions on books and share them with others, similar to online comment culture. This tendency to share experiences and tastes expands reading from individual activities to consumption that forms relationships and communities. However, whether it is a temporary fad or will lead to continuous reading habits remains to be seen.
