The Art of the WPA
I came across this book, The Art of the WPA by Ennis Carter (Quirk Books, 2008) in ReadyMade magazine (December 2008/January 2009 issue). It's the 75th anniversary of the New Deal, btw. Check out the magazine's website to download new versions of the art: ReadyMade: Instructions for Everyday Life
For prints of some of the original posters, go to the Library of Congress shop: The Library of Congress Shop