Hmm. I do not quite agree with the previous comment. I thought the author was still generally partial and objective. I'm a big Roger Waters fan and I thought for many solo albums of Roger, he was rather harsh and gave a very good review to Gimour's On an Island. But, from my point of view, while I did not agree on all of the authors review and top-50 song selections either, I like the fact that an author gives his own perceptions and I think many of the comments were well balanced with the good, the bad and the ugly for each album and/or situation, whomever member was involved. (i.e.: about the Final Cut "there was no easy entry for the casual fan here" AND "For those prepared to enter its chilly embrace, The Final Cut's rewards are not inconsiderable"
While a given album may be popular, that doesn't necessarily mean it is a well made album and that it has artistic merit or rigor in the composition of the music or lyrics. Same with a movie. While "Back to the Future" may be fun to watch, it has not the artistic qualities and deep-thought rigors of "2001: A space odyssey" and/or "Stalker".
Appreciation of a piece of art (music, movie, novel, etc.) is all in the eye of the beholder and it all relates to one's personal emotions, but I think the author does a solid effort in highlighting technical, lyrical and emotional forces and weakness of each album. The book is well documented with plenty of quotes from the band and for once, we have in-depth comments on the solo material and careers of each member (without focusing necessarily on Syd).
Richard