Secrets of the Ninja by Kim Ashida 1985, pb book

The paperback book is a comprehensive guide to historical and tactical aspects of Ninjutsu, also known as "The Silent Way". It is intended for academic study and covers various techniques, including:
Methods for achieving invisibility and covert entry.
Techniques for erasing sound and shadow.
Sentry removal tactics.
The art of escaping and evasion.
Descriptions of traditional ninja weapons like the sword, nunchaku, and shuriken.
Book is in good vintage condition.