One can have the impression of repetition of the 4 books, but it's actually a well thought progress: the number of each volume indicating a level. It is also written with no ill humor, in short, almost perfect. "Almost" because the book is -without surprise oriented Canon / Nikon. Indications are, however, clear enough that the owners of other brands meet there. It is to this day, I have read most complete and practical shooting. A suite that would undoubtedly benefit to be translated!
