Explain what is said in the book and what readers can learn from it.
Judging from the completeness of the book's knowledge system, it shows which piece of knowledge the book can fill the readers.
Based on the above two points, we must recommend books systematically and systematically when recommending books.
Why does reading sometimes make us feel very happy?
Mainly because the knowledge in the book collides with our own knowledge system, which broadens our horizons and improves our thinking and cognition. Let us experience some new feelings. The greater a person's own knowledge system, the greater the chance of colliding with the knowledge in the book.
Since ancient times, human knowledge can be divided into three fields (natural science, social science and thinking science). Natural science studies the laws of motion in nature; Social science studies the laws of social movements; Thinking science studies the laws of human thinking activities.
Accordingly, all books can also be classified into these three categories. These three categories can be further subdivided into literature, economy, thinking, science and technology and many other subcategories.
If you haven't studied books in this field systematically, then your knowledge system must be incomplete. If time permits, priority should be given to each subclass covering these three categories. This solves the problem that others focus on their familiar fields when recommending books, but can't take care of the overall situation.