Led Zeppelin require no introduction amazing records, blueprint setting concert tours and the ultimate in hotel worrying rock n roll antics. The band's legend grows yearly, and a brand which is stronger today than it's ever been has grown up around them. Many biographies and studies, but Celebration Day is the first to explore the group's world and career in this fashion, being an exhaustive A to Z reference work that deals with every song on each of their albums, every major gig they ever...