I read Black Like Me by John Howard Griffin in highschool. Recently I listened to the the audiobook narrated by Ray Childs. It made an impact when I read it in highschool and even more so as an adult. Childs did a fantastic narration job.
Griffin finds a way to make himself "black" then he goes in to the deep south as a black man and tells the story. He shares how he has to walk blocks or miles to find a bathroom or some water to drink. Basic things we take for granted were not available to the black man or woman in the 1960's.
It's shocking really. I think it's a must read if only that so that this never happens again.