Zoë Monday Costello is the go-to gal at school, where shekeeps recess in order, and at home, where she keeps acareful eye on Grandma’s medicine. Her invisible rules (like ASmart Girl Doesn’t Put Up With Anything) will have you well-preparedfor life’s surprises, big and small. When a new girlwith a reputation arrives at school, Zoë is determined to helpher fit in—but her meddling backfires . . . Is there any unwrittenrule that can help Zoë now?