The theory of becoming a bodhisattva was written by Yoshida, whose full name is becoming a bodhisattva. Sodagi Kampo said in the book "On Bodhisattva": "On Bodhisattva" is an essential work for people who study Mahayana Buddhism. In all factions of Tibetan Buddhism, practitioners in every regular temple will preach and listen to this theory; Moreover, a general concept has been formed. To become a true practitioner, one must be proficient in "becoming a Bodhisattva".
Therefore, the entry theory is not a layman's book, so you can study it with confidence.