(This blog post represents my personal opinion, and should not be interpreted as any official statements from my employer NVIDIA.)
The book got published about a week ago and I received my own hardcopy yesterday. A free sample chapter can be found on the Downloads page, or just click the image of the book on the front page. I also uploaded large versions of the DL cheat sheets from Appendix J. Links can be found on the Home page and on the Downloads page. The book can be bought from the publisher following this link, or order from Amazon.