This compilation gathers the very best of the British band’s late-’60s blues-rock output. Among the highlights are two Peter Green gems: the Latin sway and simmering lead lines of “Black Magic Woman” (later covered by Santana) and the languid, sighing instrumental “Albatross.” Fleetwood Mac had an embarrassment of great players—check out Danny Kirwan’s spidery guitar runs on “Jigsaw Puzzle Blues” and Jeremy Spencer’s rough-hewn howl and rattling slide on “I Believe My Time Ain’t Long.”