After her parents' divorce, eighth-grader Rachel Lee joins her mother's new housecleaning business, which has her scrubbing bathrooms in her more popular classmates' homes and learning useful secrets.

"From middle-grade darling Anna Staniszewski comes the story of a girl who might just have being popular down to a science. Lily loves science and hanging out with her best friend, Katie. But after a really embarrassing incident, she jumps at the chance to switch schools. She's ready to start over. With the scientific process, anything is possible! After a summer spent coming up with theories and prepping for the switch, Lily starts her new school...