I guess it would help to post the actual link. :-D
http://www.naalamedacounty.org/elements/literature/Basic%20Text,%20Narcotics%20Anonymous/Basic%20Text,%20Narcotics%20Anonymous%20-%20NAWS_%20Inc_.pdf
I am not sure that will work, but check it out. If not just google NA Basic Text
I found this PDF link on google. It is the full text. All 415 pages of it. It says its 6th edition.
You can also find it online . . . just Google
The Big Book is for AA. What you are looking for is The Basic Text. You can get one new or used on Amazon. Great reading. Here is the link:
http://www.amazon.com/Narcotics/dp/0912075023
They have them at meetings. There is no charge for them here. Work your recovery for you~~
You can get one at a meeting. NA calls their book the Basic Text.
If you don't have $$ someone will give you one.
check amazon I think what your looking for is called the big book..........Gnarly