Few styles of popular music have generated as much controversy as progressive rock, a musical genre best remembered today for its gargantuan stage shows, its fascination with epic subject matter drawn from science fiction, mythology, and fantasy literature, and above all for its attempts to combine classical music's sense of space and monumental scope with rock's raw power and energy. Its dazzling virtuosity and spectacular live concerts made it hugely popular with fans during the 1970s, who saw bands such as King Crimson, Emerson, Lake and Palmer, Yes, Genesis, Pink Floyd, and Jethro Tull...

Throughout the 1970s, no style of pop music was more controversial than progressive rock, and no progressive rock band was more controversial than Emerson, Lake and Palmer. The group's imaginative fusion of rock, jazz, and classical motifs with cutting-edge technology, breathtaking virtuosity, and monumental stage shows made them hugely popular on both sides of the Atlantic -- and gave rise to a host of detractors. In Endless Enigma, Edward Macan argues that ELP was an important contributor not only to progressive rock, but to 1970s rock in general. Besides a magisterial band...