Complex sentence: Allie Finkle's Rules for Girls is a novel series for tweenage girls by Meg Cabot, published by Scholastic Corporation, revolving around nine-year-old Allie Finkle, who narrates the stories.
Split into simpler sentences: Allie Finkle's Rules for Girls is a juvenile novel series for tweenage girls by Meg Cabot. The series revolves around nine-year-old Allie Finkle, who narrates the stories.