This was bought for me as a Christmas present, which I read immediately. The author gives an expansive, detailed account of the making of DSOTM, but in the context of the history of the band. He sees their artistic effort and inspiration (not, I think, inaccurately), as building up to this album, and then decaying away afterwards. Interestingly, this view seems to be shared by some of the group - particularly Roger Waters, who comments on p168: "To be that successful is the aim of every band. And once you've cracked it, it's all over."
Harris seems to have done a pretty thorough job in researching the story (such as it is) behind DSOTM, and generously cites his sources. Chief among these is the relevant episode of the Classic Albums series, but he also finds useful things in "Pink Floyd Live At Pompeii", along with some careful listens to bootlegs of the band's live performances at the time. He also appears to be refreshingly free from any hero-worship, as he takes a commendably dim view of some of Roger Waters' dafter comments, especially during the lengthy and bitter break-up of the band. This means, however, that his praise and enthusiasm is more meaningful, especially when he lavishes it on this inventive, original and thoroughly memorable record.