Brasilian Jiu Jitsu Reference
http://www.grapplearts.com/ – download the free book.
You’ll have to provide your e-mail address and he will be sending you some really interesting newsletters .
You can unsubscribe at any moment if you wish. There are some very good articles on the site as well.
Be mindful, that in addition to the tons of free articles and videos, he is selling (naturally) apps and DVDs which you really don’t need or obligated to buy. Especially at this point of your journey.
This is the source of the Gracie Jiu Jitsu.
Here you need to sign-up for free membership. You’ll get access to the 6 free lessons and videos with conceptual explanation of their philosophy and mindset. Not all historical facts presented here are 100% truth (they are not Oracles or saints, some information is contested and controversial), but everything related to technique and fighting philosophy is rock solid and tested in real life.