This book is the first of its kind outside of Japan. Its author relied exclusively on Japanese sources: treatises by the ninjas themselves, exhibits from museums dedicated to them, and research by Japanese historians. The book reveals the true, not fictitious, history of the ninja and exposes the fabrications of modern falsifiers posing as “teachers of ninjutsu.” Numerous examples of weapons and technical devices of the “warriors of the night” are examined here. The design thought of the ninja was in many ways ahead of its era. Among their developments are missiles and salvo fire systems, anti-personnel mines and flash-bang grenades, poisonous gases and food concentrates, parachutes and pedometers, listening devices and silent guns, folding boats and multifunctional overalls, and much more. With the help of their technical devices, ninjas made acts that seemed supernatural to contemporaries. They became invisible, penetrated walls, flew through the sky, swam underwater, killed with the touch of their hands, took on many different forms...