武神館武道伝承書 2 九鬼神伝流 カールステン・クーン著

Bujinkan Budo Densho Book 2 Kukishinden Ryu by Carsten Kuhn

I love this series. Great reference! Not cheap, but a good source of information to support dojo training.

Bujinkan Budo Densho: Kukishinden Ryu Book by Carsten Kuhn

This is an awesome book. So many training aspects to learn from.

Excellent book