TBH it looks pretty good. Covers lots of theory, lots of repertoire graded for ability, and I'm super happy to see it covers rhythm. I think a few people knocked it for typography, I'm not that picky. Perhaps one of the biggest problems with any book is what is the % of people that finish any book much less 9 of them? Realistically this seems better suited as material for a teacher to incorporate into lessons.
I think the one thing that apps and video lessons offer autodidacts that books don't is repetitive guided practice. Going through every scale & chord with you, guiding you though syncopation exercises, walking you through a harmonic analysis, etc...