
A brilliant idea for a compilation, beautifully executed: 16 recordings of music and spoken word — and sometimes the places where they overlap — from the heyday of the American black-power movement. Some of it is great on its own (Gil Scott-Heron’s “Winter in America,” or Stokely Carmichael’s 1968 speech on behalf of Huey P. Newton); some of it is made fascinating by its context (like John Lennon and Yoko Ono’s earnest, clunky “Angela”). The art book of the same name is equally riveting.