One of the most fascinating and enigmatic -- if not the most successful -- singer/songwriters of the late '60s, Leonard Cohen retained an audience across six decades of music-making, interrupted by various digressions into personal and creative exploration, all of which have only added to the mystique surrounding him. Second only to Bob Dylan (and perhaps Paul Simon), he commanded the attention of critics and younger musicians more firmly than any other musical figure from the '60s who continued to work in the 21st century, which is all the more remarkable an achievement for someone who didn't even aspire to a musical career until he was in his thirties.