On the afternoon of October 12, 1990, my twin brother, Thomas, entered the Three Rivers, Connecticut, public library, retreated to one of the rear study carrels, and prayed to God the sacrifice he was about to commit would be deemed acceptable. . . . One of the most acclaimed novels of our time, Wally Lamb’s I Know This Much Is True is a story of alienation and connection, devastation and renewal, at once joyous, heartbreaking, poignant, mystical, and powerfully, profoundly human.