I will preface this by saying I do love AC/DC, have always been a fan, have seen them a number of times in concert, etc. I probably would never have bought this book, as I already think AC/DC is arguably the best rock n' roll band, but I won it in a contest so it was cool to read it for free. In any case, while I do agree with Bozza's whole argument that despite what the music "critics" seem to think, AC/DC is an important band, I am not sure whether it was worthy of a book, even one as compact as this. He makes some good points about why what they do is unique for its' simplicity and power, and obviously the whole series of events leading up to 'Back In Black' [and it's subsequent success] speak for themselves. But, providing a good overview on the bands' history does not equate with a justification of why they matter.
Overall, I am not sure who this was written for exactly, except perhaps Bozza himself. For someone who already likes AC/DC, there is really nothing new here. For someone who doesn't particularly like them, or even dislikes them, I doubt they would even pick it up in the first place. And honestly, reading a book about a band is not going to suddenly make you respect or even like that band: I could read that Nickleback has incredible similarities to Beethoven, but I will still think they suck [sorry to any Nickleback fans, but they do... ;) ]. At the end of the day, I think this would have made a much better magazine article than a book - and likely gotten to a wider audience.
But, really, if there's any doubt and if you want to know why AC/DC matter, just get a copy of 'Highway To Hell' and 'Back In Black'. If that doesn't do it for you, then you're clearly never going to be convinced.