"The idea of human cruelty to animals so consumes novelist Elizabeth Costello in her later years that she can no longer look another person in the eye: humans, especially meat-eating ones, seem to her to be conspirators in a crime of stupefying magnitude taking place on farms and in slaughterhouses, factories, and laboratories across the world. Costello's son, a physics professor, admires her literary achievements, but dreads his mother's lecturing...