Gary is a great guitarist, and even more impressive considering he started out as a drummer. It will take you a while to fully grasp his stuff. Neil will be a little easier.
Like Doc said - Amazon for the books (I'm about the same on the singing part too).
If you're on a budget, check out:

http://hyperrust.org/Music/?Tab

The blue scroll menu on the right lists all the songs/tabs for virtually all of Neil's stuff. Most of them are pretty good.

I always liked the line from [U]Old Ways[/U]:
"Economy was gettin' so bad I had to lay myself off
but workin' was a habit I had so I kept showin' up anyway"