Hey, anyone know of any good GLSL books/tutorials? Thanks.

(yeah I googled, most tutorials explain how glsl works but don't have a basic intro to coding in it)
Anything free? Or not requiring a credit card? XD
After all, where would the book come from if nobody paid for it. ?? You can't make good products if all your "customers" are pirates. :P
Who said anything about pirating? I just posted a random link. >_>
Not talking about your link Bink.

I was replying to Imon's post. No offense intended.
Looks good, does anyone here own it?
I don't wanna buy it unless I'm sure it's useful as I have just about -->$0 right now because I bought an awesome 6X11 wacom tablet. (:
btw--I completely recommend all texture artists get a wacom tablet (not a small one though), they're so useful!
My sister has a Wacom tablet, and I borrow it a lot.

It's pretty large too, works great.