“It’s been a seeping, decentralized thing; to call it a takeover would be hyperbole. But the assertive Nigerian global influence today cannot be denied, whether it’s in literature, music, fashion, or art, with new talents appearing at a relentless pace. Many hold court in London, … [and] others are in the United States, where middle-class immigrants have flourished in places like Houston and Atlanta. But all of them feed off the scene in Nigeria itself — and in its megacity, Lagos, a frenetic engine of creativity.”