Increased Mechanization and the expansion of new markets transformed the face of American farming in the early decades of the twentieth century, especially in the American West. These changes demanded a new kind of agricultural worker--gone was the local farmhand, replaced by a cheap and temporary labor force of migrant and seasonal workers. Greg Hall's fascinating book analyzes how "harvest Wobblies," members of the Industrial Workers of the World (IWW), organized these men, women, and sometimes children who had become so essential and yet so exploited on the farms of the West. Although harvest Wobblies worked in nearly all the western states, their stongholds were the Great Plains, California, and the Pacific Northwest, regions where harmers developed monocrop agriculture and where seasonal labor was indispensable come harvest time. Like their IWW brethren in logging camps and mines, the harvest Wobblies combined an effort to improve the lives of workers with harger revolutionary goals. Harvest Wobblies personified most of the indelible features of IWW membership: they were the militant casual laborers of the American West, riding the rails, living in hobo jungles, preaching revolution, and facing repression with innovative strategies, impassioned speech, humor, and song. Through trial and error, Wobbly organizers eventually implemented the idea of an industrial union in agriculture and helped the IWW to establish itself as a powerful force to be reckoned with by employers in the West. In tracing the rise and the eventual fall of the harvest Wobblies, Greg Hall examines the diverse and changing nature of the agricultural work force. He offers a social and cultural history of a union uniquely suited to organizing tens of thousands of migrant and seasonal workers. Harvest Wobblies will appeal to a broad audience of readers interested in labor history, the American West, U.S. agricultural history, and the history of the IWW.