[no-bugs]

> Is the entire book completely free or was this just some parts of it? Its too good to be true.

"beta" of the entire book is going to be free. "Release" version is going to be paid (sorry). OTOH, if you make a "useful" comment (the one which makes me to change the text, by pointing out a mistake, suggesting something, or asking a good question which is not covered yet) - you'll get e-copy for free.

> This has to be the first book that extensively goes through writing one, right?

To the best of my knowledge - yes. There are bits of information available here and there, but certainly not everything in one place.

[seivan]

Hey man best of luck! Looking forward to see how this ends up going. I won't be tackling this again but I've always hopped someone write a book about it. I read some. You're doing awesome work. Reminds me of the game pattern book by Nyström!

[no-bugs]

Thanks! And BTW Nystrom's Game Programming Patterns is one of a few great books on game programming, so I take comparison as a compliment :-)