A director writes about the creative process
If you know Shirou's "Ghost in the Shell" comic and Oshii's anime version of it, you will probably be really interested in this anime series. Then again, if you know the first two, you probably already know about the series.
I enjoy the series a lot. I like stories that deal with what it means to be human. Struggling with consciouness, right, wrong.
I checked out the official webiste and they have some writings by Kamiyama, the directer of SAC in the extras section.
Even if you aren't into anime, this guy has a lot of interesting things to say about the creative process and is definitely worth the read. Link
Be patient with the writing style. I don't know if he wrote it in English or if it was translated. It doesn't flow as smoothly as native English, yet it has a very nice flow if you give it a chance.