Woody Guthrie: Poet of the People by Bonnie Christensen

From the back of the book:
This book celebrates the life and times and the spirit of an American original - the great fold musician Woody Guthrie. His most famous song, "This Land is Your Land," is sung by schoolchildren today nearly as often as [the American] national anthem. And his songs expressing the thoughts and feelings of ordinary Americans during the Great Depressions and the 1940s are still heard whnever people gather to sing out for peace or the environment or justice.