Dental radiography Book

OH.
MY.
GOD.

First of all, let me say that I worked in indie/collector record stores off and on for over 10 years. I've seen record collectors up close and personal, and honestly I really admire their passion for their interest. I've verged on it myself. Until I did it for a living for more than, say, 6 months.
My issues with this book:
This is not about country music. It is about blues, minstrelry, and Jerry Lee Lewis. And it's a lot of "...and this can be seen when [artist:] recorded [song:] in [year:] (label), and [artist:] recorded [song:] in [year:] (label), then [artist:] recorded [song:] in [year:], ..." etc. etc. ad nauseum. Any connections between country (let alone, the "twisted roots of rock and roll") are not really made. As a matter of fact, even his long diatribe in the second chapter ("Orpheus, Gypsies, and the Origin of Rock 'n' Roll"), meant as scholarly I suppose, is a long string of bullshit.
I read these books to get more information on the artists I do know, and to be intrigued enough about folks I don't know to seek them out. Even my interest in the wonderfully mysterious Emmett Miller was absolutely snuffed out by his Appendix, where the mystery was distilled into "[artist:] recorded [song:] in [year:] (label), which was then covered by [artist:] in [year:] (label), ... oh yeah, and MINSTRELRY, YEAH, THAT WAS SOME BADASS SHIT!!!" You get the idea.
The man obviously knows his shit about artists, records, labels, etc. but this book is incoherent, reads like a barely (and poorly) edited version of his 3x5 notecards from his research, and the ties to the supposed premise/theme of the book (i.e., country music and its ties to early rock and roll) are tenuous at best. This would be a great resource book for others that are, like the author, huge record collectors. Maybe they would get more than 20% of the references to [artist:] recording [song:] in [year:] (label) and it would be meaningful to them, but for the rest of us mortals it's just snooze city.