Prairie Style Architecture: Images, information and sources for several houses by Frank Lloyd Wright in Great Buildings Online.
Prairie Styles: Provides biographies of the architects and artisans of the Prairie school, with expandable thumbnail photographs of selected works.
The Airplane House: History of 1912 residence designed by Purcell and Elmslie in Woods Hole, Massachusetts.
The American Foursquare: Illustrated description from About.com of the American Foursquare (or Prairie Box) house, including a list of features.
The Prairie School Traveler: Features an overview and a listing of Prairie School buildings in the United States, with addresses, photographs and historical notes.