The American Yawp: A Massively Collaborative Open History of the United States, Vol. 1 and 2 To 1877, edited by Joseph L. Locke & Ben Wright
"The American Yawp makes it possible for undergraduates to access the best, most recent, and most expansive range of scholarly work currently available. It breaks down boundaries of geography and allows college students to get a real sense of the intellectual cutting-edge. The Yawp is a real contribution." - Hasia Diner, New York University