The Magic Bullets book is a much more comprehensive book than a lot of the out of date material. There are new phases included in Magic Bullets that are not included in other books. I remember I was using old theory before I picked up Magic Bullets. Now my day game is stronger, I consistently Number Close, and I use the flake-busting techniques I found in the book.
I read it in one day, and I'm glad I did. The phone tactics are very strong and you don't really find them in too many other books. Magic Bullets is much more specific than other material and it covers topics like comfort, Kino-escalation, dating, and social circle game in a very unique way.
I'd say it's worth the read. It keeps updating so be sure to get the newest version. You want to be confident in the field so you want the best theory in your hands.