For hundreds of years, the classic ninja training manual known as "Shoninki" has served as an inspiration for aspiring ninja. Now the work finally sees the light of day in English. The "Shoninki" has ...

For hundreds of years, the classic ninja training manual known as "Shoninki" has served as an inspiration for aspiring ninja. Now the work finally sees the light of day in English. The "Shoninki" has ...