Chimamanda Ngozi Adichie's Americanah is about a lot of things—it's a love story, it's an immigrant story, it's a story about the Obama moment—but it has the most to say about race. It's about being black in America, but not from the perspective of a black American. It's about how race works in different cultures, and among different people from the same culture. It's about hair. And it's a fascinating read, every step of the way.