A substantially revised second edition in 2012 removed some poets and added many others, incorporating additional American poetry movements which came to prominence in the 21st century.
The book contains, besides poems, about 20 short essays on poetics.
The anthology, the goal of which is to "fully represent the movements of American avant-garde poetry", includes representatives from the Beat and New York School poets, the Projectivists, "deep image" poets, language and performance poetry, and various experimentalists.
The second edition adds works associated with Newlipo, conceptual poetry, and cyberpoetry/Flarf.
(poets arranged in chronological order by birth year)