http://en.wikipedia.org/wiki/Black_Like_Me
I was able to attend a book club discussion of The Help during which the group leader talked about this stirring book which was first published in 1961.
Black Like Me is the account of a white journalist who dared dye his skin black and travel through the south as a black man. I had read the book long ago, but thought it deserved a reread and it was worth the effort.
Going through this material not only helps the reader focus on how far we have come with civil rights, but how far we have left to travel.