My Sister The Serial Killer, Oyinkan Braithwaite’s debut novel from 2018 (which I LOVED), begins with a two-sentence chapter that titillates the reader and illuminates the novel’s central crisis: “Ayoola summons me with these words—Korede, I killed him. I had hoped I would never hear those words again.” Ayoola and Korede are sisters, and this call and r…
