Deeming them proto-riot grrrls would be oversimplifying matters. But Joni Mitchell, Carole King, and Carly Simon, who all rose to prominence in the 1960s, can be considered the forerunners to many of today's edgy female singers. Biographer Sheila Weller, an established author and editor at Glamour, tracks the overlapping, interlocking histories of these three performers, whose work has inspired current musicians from Janet Jackson to Conor Oberst. Through interviews with friends, family members, and fellow artists, Weller investigates the inner lives of the artists, and examines why their work continues to permeate pop and rock culture.