Ummmm.... Sorry, I forgot to mention that I am already about halfway through it, and I can't seem to get back into it. Being a reflection, it is fairly informal, so I simply describe the photos and then explain their meaning. I just always seem to veer away from the screen in the middle of a sentence and start tapping something or staring into space.
Put yourself into those photos. What would it be like to live through the depression? What would you have felt if you were a young black man living in the South during the 1930s?
As I suggested earlier, working from a good thesis sentence -- perhaps explaining your emotions on viewing the photos and thinking about the two novels.