Billy was quiet all the way home from the library. Mom glanced in her rearview mirror to see if he was reading, but he wasn’t. He stared out the window with a blank face. Later he fidgeted with his hangnails. When they got home, Suzie carried her book bag to the living room and dumped all her books onto the floor and immediately started reading. Billy shuffled to his room and dropped his backpack beside his bed, then kicked it a couple times so it went mostly under the bed—it