Book excerpt: In Listening to the Future, Bill Martin sets the scene for the emergence of progressive rock and examines the most important groups, from the famous to the obscure. He also surveys the pathbreaking albums and provides resources for readers to explore the music further. "Written with the insights of an academic, the authority of a musicologist, and—best of all—the passion of a true fan. Martin charts topographic oceans, courts crimson kings, does some brain salad surgery, and generally rocks out in 7/8 time." —Jim DeRogatis Sun-Times music critic