Not bad at all, it's nice to have all this information assembled as it is. I think the author provided useful information without getting into boring details, at least as the book appears at: [...]
I get the impression that the entire book is online at the above link, but if that is the case I can't comprehend how it would fill 97 pages. The free online version has a number of active cross-links, which makes it easier to navigate than the Kindle format would be. My four star rating is for the online version not the e-book or print version, although I think it reflects positively on those formats as well.