I reviewed Frank Bardacke's fine book about the United Farm Workers and Cesar Chavez,Trampling Out the Vintage, twice:
http://labornotes.org/blogs/2011/11/cesar-chavez-and-enduring-poverty-farmworkers
http://cheapmotelsandahotplate.org/2011/12/05/and-the-farmworkers-are-still-poor/
The second review is more extensive.
Monthly Review Press will be publishing a book about farm labor and the UFW, by Bruce Neuburger, titled Lettuce Wars. Watch for it in January. Maybe Doug can have Bruce on his show!