I think taking what
one person says and making it your bible is a terrible thing to do, especially someone who took AAS. Yeah, they might have had a great physique, but there are people who I'm sure totally disagree with them and lifted an entirely different way that also had great physiques. That, and unless you're juicin, I wouldn't even try Arnold's routine. Learning how to get
big naturally is a LOT harder than learning how to get
big on AAS. What works for
one person won't necessarily be the best way for another.
Read everything you can. The internet is an awesome, magical place, with LOTS of different points of view on training. If you don't know how to find it, get a book on using a search engine.

Not dissing any
books recommended here, just saying read more than what
one person thinks on the subject, and you'll have a much more well-rounded knowledge of the subject. Actually, I might pick up Arnold's book, I haven’t read it yet.
One name I really respect when it comes to training (naturally) is Charles Poliquin. Don't know if he has a book, but he has LOTS of articles just about everywhere.
Anyway, that's my 2.5lbs.