Mathematical modeling establishes mathematical models of problems in life, solves them by mathematical methods, and then applies them to problems in life. If you want to take the road of science and engineering, even if you don't like mathematics now, you will find that mathematics is "riding on the Lord" and the original meaning of things (of course, many repetitive skills are not included). Books, there are officially designated books, and those books are very good. For example, Jiang Qiyuan took part in mathematical modeling and gained a lot of knowledge. If you want a paper, leave your email, and I will send you the second prize paper (topic 20 1 1c).