Unlike many negative opinions on the site, I find this book quite well !! Indeed, it compléte wonderfully record, it is much more clear, the explanations are accompanied by pictures which allows to understand what it is. As Vincenti said, it is much nicer to read the manual and quickly found there what one seeks. For my part, I own version Luc Vincent, also very good, but much more complicated and longer, which is a drawback when a simple adjustment cherce !!! In conclusion, a nice book (appearance also counts for me!) To have more of the record and that of Luc Vincent to be on top of the info on the 7D.
