The other parenting book that changed me is by Ross W. Greene. It is called - Raising Human Beings: Creating a Collaborative Partnership with your Child.
Between Dr. Shefali and Ross W. Greene, you're covered in the parenting arena. And I speak to this from my personal experience. I have implemented different strategies from both books and also reflected on my own personal development as a parent and how I behave and why I did that. It's unlocked so many insights for me that has advanced not on my parenting game, but my life game as well in other relationships.