For many, T. Rex founder Marc Bolan remains forever frozen in time as the poster boy of glam, the pop-rock genre he effectively launched with his March 1971 Top of the Pops appearance to promote 'Hot Love', the band's first number one single. To see Bolan only in this light is to view him through too narrow a focus. In John's Children he flirted with modernist art-rock. He sang folk songs of an otherworldly England in Tyrannosaurus Rex and became...