Book excerpt: Poetry FM is the first book to explore the dynamic relationship between post-1945 poetry and radio in the United States. Lisa Hollenbach traces the history of Pacifica Radio--founded in 1946, the nation's first listener-supported public radio network--through the 1970s: from the radical pacifists and poets who founded Pacifica after the war; to the San Francisco Renaissance, Beat, and New York poets who helped define the countercultural sound of Pacifica stations KPFA and WBAI in the 1950s and 1960s; to the feminist poets and activists who seized Pacifica's frequencies in the 1970s.