XNA 4.0 free e-books [closed]

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Does anybody know some XNA 4开发者_开发问答.0 papers. I'm interested in e-books and other documents/papers. Preferably free....

Non-common websites are also welcome :) (Not returned from google search)

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Charles Petzold's new Windows Phone 7 book covers XNA on the phone, that might be useful.

Free download from his site here: http://www.charlespetzold.com/phone/index.html

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Microsoft have updated all of the Education catalog to be version 4. I'd start there. At this present time, I don't think that there are any Game Studio 4 books. Maybe only available on pre-order.

Shawn Hargreaves blogged about a free e-book, but I believe it's more for Windows Phone 7 development.