Walter Prescott Webb became one of the best known interpreters of the American West following the publication of The Great Plains in 1931. That book remained one of the outstanding studies of the region for decades and attracted considerable attention over the years for its unusual emphasis on the impact of geographic factors on the process of settlement. Using manuscript sources, some of which had not previously been available, Gregory M. Tobin has traced the elements that went into the planning and writing of The Great Plains and that account for its distinctive approach to the...