As a young music journalist in 1975, Stephen Davis got the opportunity of a lifetime: an invitation to cover the sold-out 1975 North American tour of Led Zeppelin for a national magazine. He received a backstage pass, was granted interviews with band members, and even got a prized seat on the band's luxurious tour jet, The Starship. While on duty, he chronicled the Zeppelin tour in three notebooks, but after writing his article in 1975 he misplaced them. After three decades of searching, he finally found the notebooks in 2005, on the covers of which he had scribbled the words "LZ-'75", and unearthed loads of new information from the tour.

In "LZ-'75", Davis offers an unseen look at a pivotal year in the life of the band that includes lost interviews with canny vocalist Robert Plant and brilliant guitarist Jimmy Page; information on the rock icon who moonlighted as a heroin dealer; revelations about the identity of the lover Robert Plant sings about in "What Is and What Should Never Be" and "Black Country Woman"; and a vivid account of the band members' extravagant, and often troubled, lives on tour.

Tied together by Davis's entertaining narrative, "LZ-'75" is an unprecedented and comprehensive personal portrait of the greatest (and most notoriously press-shy) rock band in history at its apex.