At first I was hoping for the sample chapter to be something other than debugging, but after having read the sample chapter I actually like that the sample is on debugging. I found learning how to use the debugger in CodeBlocks pretty hard compared to my experience with Visual Studio, and I couldn't really find any good information online, so I had to stumble around a LOT to learn enough to not rely on VS for debugging anymore.
So I think it's really handy that this sample chapter was on debugging, and I did learn quite a few things (finally a clear explanation of what the hell extern "c" does).
I'll have to check out the rest of the book. Regarding Barnes and Noble, is it only online or were at least some physical locations going to carry it as well?