In this informative academic look at the music of Black Sabbath, composer and music professor Stolz undertakes a song-by-song analysis of many of the band’s recordings, from its 1970 self-titled debut to its The End tour in 2016. Stolz meticulously explores what made Sabbath’s music so heavy: the ‘frightening’ sound of the band’s reliance on the tritone (the interval between two notes long known by classical composers as the ‘devil in music’), which was heavily used in the blues-influenced music of early Sabbath. He also explains how the ‘dreadfully slow’ tempos made many songs feel ‘doomy.’ Stolz expertly shows how, in their later albums, Sabbath pursued a progressive sound by incorporating tempo changes, dissonance, and variety of rhythms.... Stolz's analysis is insightful.... This is a volume for die-hard Sabbath fans.

Publishers Weekly

A fascinating read covering the complete history of the band. The depth of analysis is astonishing, dealing with every riff and nuance. This is the definitive work, encompassing the music and a comprehensive and detailed analysis of the legendary group. Amazing work!

Laurence Cottle, former bassist, Black Sabbath

Nolan Stolz has impressively found a way to add to the current writings on Black Sabbath, most notably with his detailed deconstruction of each song. The beauty of this approach lies in the novice and deep Sabbath fan alike inevitably and without choice scurrying back to the compositions to follow along with the author’s professional postmortem.

Martin Popoff, author of seventy music books