Porcupine Tree began in 1987 as a solo project for Steven Wilson but became a four-piece band when Steven was later joined by Richard Barbieri, Colin Edwin, and Chris Maitland (who was later replaced by Gavin Harrison). Their first live gig was in a pub in High Wycombe, England, in 1993, but by 2010 the band had toured Europe and America extensively, ending up by playing to thousands of fans at a sold-out Royal Albert Hall in London. The band was nominated for two Grammy awards, and their last album before their hiatus, The Incident, made the top 30 in both the UK and the US.

Although often labelled as a progressive rock band, Porcupine Tree constantly changed style. Beginning by playing psychedelic music, Porcupine Tree experimented with space rock, dance, trance and melodic pop as well as prog rock. In their last few albums, the band created a new hybrid of progressive metal riffs, melodic strength and rich vocal harmonies, with strong lyrics and powerful concepts. This aspect of the band has provided their most enduring legacy.

This book analyses all of Porcupine Tree's studio albums and Eps, including the hugely successful reunion album Closer/Continuation, in forensic detail, providing illuminating insight into the band's music for existing and new fans alike