5% done with The Underground Railroad by Colson Whitehead

I'm struggling with this one and I can't quite put my finger on why. I'm not sure if it's the writing style, Cora's voice, or something else. I keep finding myself having to reread bits or forcing myself to pick it up.
I really wish I could figure out what the problem is.
Maybe it's just not the right book to pick up so soon after reading Small Great Things.