As a fan of online literature, I don't make value judgments about people's behavior. However, according to what I know about online literature culture, people who post a book on their WeChat Moments after reading it might have the following mentality: 1. Show off: Show off your reading skills to others by posting about your reading experience on your WeChat Moments. This kind of behavior could bring self-satisfaction and self-confidence. 2. Sharing mentality: Some people may like to share the contents of the books they read in their circle of friends to communicate with friends, family, and strangers and gain resonance and inspiration from them. 3. Record mentality: Some people might think that posting a reading experience on their WeChat Moments is a way to record their reading experience. By posting his reading progress and feedback, he could better review his reading process. 4. Social Minds: Posting a reading experience on WeChat Moments can also be used as a social activity to meet like-minded friends by sharing the content of the books you read. In short, people who posted a book on their WeChat Moments after reading it might have a variety of attitudes, depending on their personal motives and goals.