The Genius of James Brown
nybooks.com
nybooks.com
Eventually the market will tap out, aka, "How many books about Abraham Lincoln do we need?!"
Disclosure: For biographies I primarily read ones about musicians. The Rex Brown autobiography was the latest, and I do want to get around to some others.
If you look at the recording from late 1969 and early 1970, like Mother Popcorn, Ain't It Funky Now, Say It Loud (I'm Black and I'm Proud), the direction to harder funk was already very apparent.
This is to say nothing of, say, what Larry Grapham was doing with the Family Stone circa '68-'69, or other west coast funk pioneers.
I'll dig further in the titles you listed to test my hypothesis.
I don't care to listen to any Beatles songs, but I know the world would be worse off without them due to their enormous influence.