A Nigerian woman arrives in America and learns, for the first time, that she is "Black." Adichie's 2013 novel maps the untranslatable gap between an African and an African-American identity with surgical precision. Its blog chapters changed how literary fiction can use social media as voice. The most important novel about race written in the 21st century so far.

The case for it, the case against, and the rest of the canon open with Pro.