Penned by a pair of academics from beyond the Big Pond, this tome purports to present a critical analysis of progressive rock. Part apologia and part socio-historical cum philosophical treatise, it typically reveals more about the authors than the music, often connecting dubious dots, and ascribing meaning extending to the “ontological” to rock lyrics, artwork, and music via pedantic prose. Those willing to negotiate the turgidity will nonetheless encounter an abundance of intriguing information and even occasional perspicaciousness. Continuum.