This is such a cool site and one of the best sites that i have ever found about Ninja and how you can learn everything about them. The equipment/weapons is pretty cheap if you ask me and really cool looking. The only thing is they let anyone just take it which isn’t good for the criminals finding out about the site and learn the art of the Ninja.
Source: ninjitsuryu.com
You got to be kidding me. Now, the author may know a few things and even be quite formidable martial artist, but the sites and the books are designed to milk the gullible.
The only way to learn is from a good teacher (and those are in very low supply in the US for the weirdest reason. Look for Israeli, Japanese or European [especially eastern] ones).