Explain the (Earth, Water, Fire, etc.) as they relate to ninjutsu. Compare this book to Hayes' newer To-Shin Do system.
A significant portion of the book focuses on the "Shadow Warrior's" internal skills: Ninja Vol 1 - Spirit of the Shadow Warrior
Let me know which interests you most! Ninja Vol 1: Spirit of the Shadow Warrior - Amazon.ae Explain the (Earth, Water, Fire, etc