Fifteen-year-old Tess DeNunzio hasn't been the same since she lost her sister Zoe to a hit-and-run accident on September 11th—when it seemed like nothing mattered except the tragedies playing out in New York and Washington. is Tess's letter to her sister, written as a means of figuring out her own life and her place in the world—and the result is a novel of rare power and grace that tells us much about ours.