With Fairport Convention and solo, Sandy Denny displayed one of contemporary music’s finest voices; she also composed her own material, including Who Knows Where The Time Goes –a huge U.S. hit for Judy Collins–and sang on Led Zeppelin IV.

However, Sandy tragically got caught in a spiral of drink and drugs and died at age 31 in 1978.

Best-selling Dylan biographer Heylin draws on hours of new interviews to tell Sandy’s story.