We discovered (and devoured) this book! It is wonderful, delightful, a quick read but full of unexpected twists and turns.
The MC is in danger of being expelled from her prestigious boarding school for girls when her family is exposed as the masterminds of a heist to steal a $1 million lunch box. They planned it, but they didn't do it (and they won't admit it!).
She has to unravel how her family did NOT steal the lunch box, who did, and why -- all in time to make her speech at school to be elected the next head-girl.
A great read!