The fourth and final volume of the ninja series shows how, in natural terrain, a ninja can successfully overcome a variety of situations. Here is the opportunity to climb a sheer wall, overcome artificial and natural obstacles, find suitable shelters, as well as various techniques (techniques, distractions, reflections and counterattacks are clearly presented using phase photos and detailed descriptions). In the exercise section there are opportunities for a woman to defend herself from attacking men. In the interview, the author once again summarizes all the issues important to Ninjutsu and concludes: “To become a real ninja, in any case, you need to give up your favorite comforts and start a new life altogether.”