Seventh grade is going to be a real trial for Merci Suárez. For science, she's got no-nonsense Mr. Ellis, who expects her to be a smart as her brother, Roli. She's been assigned to co-manage the tiny school store with Wilson Bellevue, a boy she barely knows, but whom she might like. And she's tangling again with classmate Edna Santos, who is bossier and more obnoxious than ever now that she is in charge of the annual Heart Ball. One thing is for...