I actually finished Invisible Man a while ago, and I've been putting off writing my post about it, because I simply do not know what to make of it.
To tell you the truth, I think the narrator didn't really know what to make of it, either. He experienced so many layers of prejudice, denial, pride, paternalism, indifference, victimization, stereotyping, adventurism, and wishful thinking that I don't think, even at the end of the story, he had a real sense of himself. I would go so far as to say he was less an invisible man than an indeterminate man.