The six horrible Herdmans, the worst children in the history of the world, cause mayhem throughout the year at Woodrow Wilson Elementary School.

After her mother leaves home suddenly, thirteen-year-old Sal and her grandparents take a car trip retracing her mother's route. Along the way, Sal recounts the story of her friend Phoebe, whose mother also left. As Sal entertains her grandparents with Phoebe's outrageous story, her own story begins to unfold, the story of a thirteen-year-old girl whose only wish is to be reunited with her missing mother. Here the author weaves together two tales,...