The most instructive book for women around 40 years old.
As the saying goes: know without confusion. A 40-year-old woman is in the period of physiological function variation, is in the age of no doubt, is in the second adolescence of her life, and her mood fluctuates. If she is a little careless or encounters setbacks, her feelings will easily derail. The pure black "Let Go of Love" is worth reading. It will guide you to the maze and steer your own life, knowing without confusion.