I read this on the wave of the great Everyday is for the Thief.
At first, it seemed that Cole is the king of non-story fiction: there is no structured plot in sight. In Everyday is for the thief, it resulted in a great impression of Nigerians' psyche. However, Open City only showed me a closeted essay without clear conclusions. There is something about racism, prejudice and the inscrutable pain of living, but that is all I've got.
And the disconcerting revelation made in the second-to-last chapter really ruined it for me. As I write, I'm meditating about its meaning, and how the parable relates to that.
So I guess I wasn't ready to read it at all.