Hard Interpretive Essay Question

I seem to really be struggling to come up with a good question for an Interpretive Essay I have to do for History. The book we'll be doing the essay on is When I Was a Slave by Norman R. Yetman. The question and answer, or thesis, have to be focused(neither too broad nor too short), interesting, motivating, and controversial, all at the same time. Whenever I think I may have come up with a question and answer, one of the requirements above just seems to be missing. I find this to be really frustrating since the paper is due next Tuesday and I'm not able to get anywhere on it at the moment. I wonder how everyone else is doing with this paper. They all seem to be total slackers so they probably haven't really started working on it yet. I'm sure that those who have started it are probably just as stuck as I am. Fortunately, the grading scale for my History class is very low, so even if it looks like I haven't done a good job, I'll still be getting a passing grade.