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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 Academy—in 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 difficult…especially with nosy Melanie Maplethorpe snooping around. This secret is huge. Will Heidi be able to keep her promise?

350 pages, Kindle Edition

Published March 5, 2024

37 people are currently reading
69 people want to read

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Wanda Coven

134 books97 followers

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5 stars
112 (60%)
4 stars
53 (28%)
3 stars
11 (5%)
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Displaying 1 - 8 of 8 reviews
1,156 reviews13 followers
March 16, 2024
Heidi is back in book 3 with trying to keep the biggest secret ever. It’s a cute story and teaches middle schoolers the problems with telling and keeping a secret.
Profile Image for Our Weekend Is Booked.
733 reviews5 followers
March 30, 2025
Middle School and Other Disasters: Biggest Secret Ever is the latest installment in Wanda Coven's series that follows Heidi Heckleback and her friends while they attend Broomsfield Academy.

Heidi becomes friends with a new girl named Isabella and learns a huge secret about her past that she promises to keep. Things get complicated when Heidi's roommate stumbles upon the secret, forcing Heidi to resort to her (sometimes unreliable) magic. Ultimately, Heidi learns some lessons about magic and friendship that make for a very entertaining read.

What I Liked: Heidi is a very relatable character. Her emotional rollercoaster is authentic and entertaining, making her a character readers will instantly connect with. Like any good story there is some conflict and drama, but what sets this story apart is the little bits of magic sprinkled in. I love the use of illustrations and the bigger font sizes used. As a school librarian, I know how much this appeals to middle-grade readers, making the book accessible and engaging.

Biggest Secret Ever is a delightful middle-grade book filled with friendship and magic.

This review first appeared on YA Book Central and can be found here: https://yabookscentral.com/middle-sch...
Profile Image for Pam.
9,814 reviews54 followers
April 12, 2024
Third book in this new series. Heidi continues to develop friendships and witch skills. She gets to know a newer friend better and discovers a huge part of their life they want to keep hidden. Heidi agrees to keep their secret and knows how difficult it will be. Readers see her struggle and get advice. When it is accidentally revealed, Heidi casts an emergency spell that makes the person not only forget the secret but Heidi too. Fortunately, she gets help from her teacher and memories are restored and the secret stays safe.
I appreciate the way Coven shows readers that all of us have weaknesses and we figure out ways to keep growing.
Profile Image for Nix Anders.
7 reviews
July 17, 2025
It was to every where
This entire review has been hidden because of spoilers.
178 reviews
September 1, 2024
I don't get how Isabella all of a sudden wanted to be Heidi's friend but other than that it was a great book.
This entire review has been hidden because of spoilers.
Displaying 1 - 8 of 8 reviews

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