The original edition of Beyond and Before extends an understanding of "progressive rock" by providing a fuller definition of what progressive rock, is, was, and can be. Described by Record Collector as "the most accomplished critical overview yet" of progressive rock and one of their 2011 books of the year, it moves away from the limited consensus that prog rock is English in origin and that it was destroyed by the advent of punk in 1976. Instead, by tracing its multiple origins and complex transitions, it argues for the inclusion of jazz and folk and the significance of post-punk and post-rock as examples of progressive rock's renewal.
This 10-year revised edition continues the discussion and further unpacks the definition of progressive rock. It includes a brand new chapter "The Concept beyond Concept" focusing on the 2010s, and the crossover musical influence of Radiohead, the return of Kate Bush, the many variants of progressive metal and folk, and new hybrid musics that move across cultures and rework the extended form and mission of progressive rock.