Chris Wade recently surprised us with "The Music Of Captain Beefheart", a 50-page book that walked us through the Captain Beefheart discography. Including various interviews.
I thought it was OK.
And now there's, "The Music Of Frank Zappa".
100 pages and subtitled "1966- 1976", so it looks like this is the first tome.
Of at least three volumes, I would guess.
More info here: