Hi everyone, imagine my pleasant surprise to see this thread! I'm thrilled to know you're diving into these materials together. What a great motivation for me to continue my work as an educator!
I'll keep an eye on this thread from time to time (I generally have moved away from forums as my attention is being pulled in so many different directions), and answer questions as I can.
Regarding any typos — very possible that some small things have been missed by me or my editor. I'll compile them, and eventually do a v2 release.
Regarding the major 7th — it's always been my thought that minor is a tonality with variations in flavor, not a set-in-stone harmonic rules. To that point, to me the true sound of minor is always the sound of melodic minor, and anything else is just a flavor (Dorian, Aeolian, harmonic, etc.). If you listen to Paul Chambers walk over So What, he uses C# in D Minor all the time since it's the leading tone... despite the fact that the tune is in "dorian" (which it is not strictly). So, when I walk, I often prioritize using Major 7ths in minor since it has more harmonic strength and support.
To everyone... I know this stuff is dense! Do your best to keep up with it and try not to get discouraged. It took me five years of practicing, and 16 months of writing this book to really deeply ingrain these concepts into my playing. A lot of it is influeneced Barry Harris's teachings and what I learned directly from Bill Dobbins, filtered through my own experiences and the lens of the bass.
It will take time. But it will work.
Keep it up!
DZ