I’ve always thought that for a book to be a word-of-mouth success, the reader has to turn the last page and be motivated in that moment to tell someone, “You have to read this!” But to me, that could be just as much because it inspired cathartic, body-shaking sobs as if it left me with a feeling of joyful elation. No matter what, it has to move me in some big, exciting, unusual way—and that, in itself, makes me happy.