Revered former Metal Maniacs editor Jeff Wagner analyses the heady side of metal in this exhaustive narrative history of a relentlessly ambitious musical subculture. Beginning with the hugely influential mid-1970s efforts of progressive rock acts Rush and King Crimson, Wagner unfurls a vast colourful tapestry of sounds and styles, from the 'Big 3' of Queensryche, Fates Warning and Dream Theater to the extreme prog pioneers Voivod, Watchtower, Celtic Frost and others.