Bostic was a badass.That's not exactly a secret, but it's not exactly common knowledge either.
Tab Smith, there's another one. Not as much a badass as Bostic, but no lightweight either.
I'm still not sure if this book is intended as a social history or a musical one.
The "forgetting" (hell, erasure) of popular, R&B- adjacent jazz (and/or vice-versa) isn't limited to the 1960s. I don't know that it's any mystery why...