This combination of book cover images shows National Book Award winners, from left, "The Rabbit Hutch" by Tess Gunty, "South to America: A Journey Below the Mason-Dixon to Understand the Soul of a Nation" by Imani Perry, "All My Rage" by Sabaa Tahir, and "Punks: New & Selected Poems" by John Keene. (Knopf/Ecco/Razorbill/The Song Cave via AP)