Let me add the Thom Hogan's book also comes with an extra, bound, short primer "Nikon D7000 To Go Guide." It's a short, no-nonsense, how do you make the camera work guide. 148 Pages.
I don't want to discount the manual that comes with the camera either. Although it could be clearer in some instances, I have seen many, many questions on this forum that are easily answered by referring to the manual that came with the camera. The nice thing about the manual is that in can be downloaded in PDF version. I have a copy on my smart phone, so I am never without a reference for the camera.