Why you would buy a book from a guy who claims to be a Canon expert, yet does NOT know the 7D had a firmware update almost a year ago that added manual audio level control? He made a huge deal out of that, and said it was a fatal flaw...
If he doesn't know something simple like that, he is definitely not keeping up.
Folks...there are two ways to make money in the photography world. You can either make money out of actually producing photographs, or you can get suckers to pay you for your so called knowledge... Nowadays, there are a whole lot more people making money off of writing books, training, and teaching photography than those making money off of actually making photographs. The whole business is upside down now and preying on the ignorant who think they need to read one more book or watch one more video and then they will finally be a competent photographer.
The best thing you can do to learn is just get out there and do it. You don't need another lame ass photography book or video.