They are called "demons of the night" for a reason. They terrified even the fearless samurai. Nothing was impossible for them. Their martial art became legendary - rumor attributed to the ninja the ability to pass through walls and fly through the air, breathe underwater and not burn in fire. Unsurpassed masters of hand-to-hand combat and espionage, scouts and assassins who completed the task at any cost, geniuses of disguise (the word "ninjutsu" itself translates as "the art of being invisible"), they kept their combat secrets for many hundreds of years. This book, based not on idle speculation, but on original Japanese sources and archival documents, will for the first time allow you to look into their holy of holies. This is more than just a story of ninjas - this is the first serious study in Russian of their martial arts and professional skills, techniques and secret arsenals, a visual aid for training the best masters of hand-to-hand combat.