Wanda Coven 
Biggest Secret Ever! 

In this hilarious third book in the Middle School and Other Disasters series, witch-in-training Heidi Heckelbeck struggles to keep a secret. Featuring black-and-white illustrations and doodles throughout!Heidi is making new friends at Broomsfield Academyin particular, a popular girl named Isabelle. But it turns out Isabelle has a big secret that Heidi discovers by accident! Heidi promises to keep the secret, but as more time goes by, it becomes more and more difficultespecially with nosy Melanie Maplethorpe snooping around. This secret is huge. Will Heidi be able to keep her promise?