Her boyfriend was obsessed with detective novels, so reading more of them might make her feel a little strange. Detective novels usually had a high degree of complexity and reasoning, which required the reader to have a certain logical thinking ability and reading ability. If her boyfriend often indulged in such novels, it might make her feel confused and uneasy. She suggested that her boyfriend should control his reading time and try to shift his reading attention to other fields such as literature, history, science, etc. This could help him better understand and appreciate the plot in the novel, and at the same time, make his life more colorful.