Alex Harvey was active in the music industry from the very birth of British rock and roll. A Zelig-like figure, he won a contest to become Scotland's Tommy Steele in the 1950s, followed the Beatles to Hamburg in the early 1960s, dabbled in psychedelic rock during the Summer of Love, and joined the house band of counterculture musical Hair at the close of the decade. By the time 1972 rolled around, he had been there and done that, but had never made...