In 2008, one of Sarah Manguso's oldest friends discharged himself from a New York City psychiatric hospital and threw himself in front of a train; the last ten hours of his life are unaccounted for. In this new memoir, Manguso continues her attention to illness, suffering, and time's relentless forward momentum, which prevents total recovery from grief. As she did brilliantly in her first memoir, The Two Kinds of Decay, Manguso explores the insufficiency of explanation and the necessity of the imagination in making sense of anything at all.