Systematic learning psychology
If you want to study psychology systematically, you can read the following books: general psychology (the most basic and introductory book of psychology), developmental psychology (children's psychology), social psychology, educational psychology, psychological consultation and counseling, personality psychology, abnormal psychology, experimental psychology, psychostatistics, psychometrics and so on.
Understand the relevant knowledge of psychology
If you just want to know about psychology, you can read the following books: interpersonal psychology (taught by Zheng Zai, etc.), mental health (taught by Li Dan in Guangxi), social psychology (Peking University), personality psychology (Gao Yuxiang of Beijing Normal University), cognitive psychology (Gao Yuxiang of Liaoning University), psychological consultation and psychotherapy (Peking University Money).
Read books on psychology.
If you want to read some books on psychology instead of textbooks, and you are interested, you can choose: Body Language Code (Aaron Pease), Moral Warning (Sade), Totems and Taboos (Freud), Unlocking the Secrets of Your Personality (Zhang, Zhang), A Heart to Find Yourself (Clifford Beers) and Night of the Soul.