World War Ninja is an adventure novel that takes us deep into the role of the Shinobi spies during WW2 and the Cold War period of the 50s. Filled with vivid descriptions of the operations and training methods of the ninja, this fictional novel takes us to a time when the difference between life and death could be measured by a single mistake. The author, Kenwa Sugihara, is a martial arts specialist with a true passion for history and the role of the ninja in warfare during the 20th century.