How can you become a Ninja?

There is no a quicker way as to how you can become a ninja except that you try to learn it through the source. Ninja goes its roots to Japan so your best bet would be to travel to Japan and find a Ninja Master. There is also another way of relying on books to learn this art and books by Stephen Hayes is no exception. First thing to know Ninja is to learn the history of ninjutsu. The art was actually used by the Military. It was adopted from China and Tibet and the real ninjas had occult powers.

Others things to know about Ninja would be to :

Understand Ninja Philosophy

Get Ninja Equipment

Learn Ninja Fighting methods

Elements in Fighting and

Their Disguise

Hope this helps.