The Key Principles Vol. 20 Number of Chapters 21Chapter 1: Back Leg Keys Chapter 2: Square Clubface Chapter 3: Back Lip of Bunker Chapter 4: Level Eyes Chapter 5: Balance and Rhythm Chapter 6: Chipping Techniques Chapter 7: Keep it Low-Maintenance Chapter 8: Straighter Shots Chapter 9: Bowed Left Wrist Chapter 10: Break Wrists Early Chapter 11: Leg Drive Chapter 12: Restricted follow-through Chapter 13: Fat or Thin Chips Chapter 14: Shots Off the...