"The Music and Politics of Black Action Films 1968-75," it says, which is a fancy way of saying "Blaxploitation Movie Soundtrack Music".
Quite right too. There is something fundamentally untrivial about a lot of this material, even if it is so generic it sometimes hurts. Wah-wah guitars quack, strings swirl, hi-hats hiss and some mother with a Fender bass hits The One... Over 30 tracks of varying quality from "Shaft" and Quincy Jones' "Call Me Mister Tibbs" at the high end to the... well, the low end. All of it is funky.