Sabotage (Beatrice Zinker, Upside Down Thinker (3))
As Beatrice hunts for clues to the culprit, Lenny suspects one of their own. Will they solve the mystery before Operation Upside becomes a fraud and is ruined once and for all? Or is the situation much bigger than any of them imagines?
Friendship problems are different in elementary school than they are in middle school, and I enjoyed how this book was very classroom-centric, and how the girls interacted with many different classmates. They suspect several of them for various reasons, like Wes and his scented magic markers, but are never mean in their interactions. They think through who might have had motive and means for creating and presenting the certificate, and work to solve the mystery.
The adults in the book are also well represented; when Beatrice makes the poor decision to investigate instead of getting on her bus to go home, we see the concern for her well being demonstrated by her parents, and I particularly liked how the principal works with Beatrice to make her understand how the school is concerned with her safety.
Readers who are big fans of Judy Moody, Ivy and Bean, Brown's Lola Levine, Mills Franklin School Friends and English's Carver Chronicles will enjoy Beatrice's exuberant antics as she tries to navigate through school and relationships with friends.