This Month
Picture Book Review
🥮 Recommended Math Story

Luna and the Case of the Missing Mooncakes

Written by Natasha Yim  ·  Illustrated by Violet Kim

PreK – Grade 2 Storytelling Math
Reviewed by Helina Seyoum Get the Book
Cover of Luna and the Case of the Missing Mooncakes by Natasha Yim, illustrated by Violet Kim, showing Luna in a detective hat and trench coat holding a magnifying glass, surrounded by mystery silhouettes

Can math stories be culturally on point, revelatory and fun? The answer is yes! And that's why we're recommending "Luna and the Case of the Missing Mooncakes" by Natasha Yim, illustrated by Violet Kim.

The story takes place during the “Mid-Autumn” or “Harvest Moon Festival”, a traditional Chinese celebration. Luna, our protagonist, is excited to celebrate with her extended family, especially her favorite cousin Mina, who brings a special box of mooncakes for dessert. Mooncakes are a traditional pastry often featuring sweet lotus paste filling with a salty egg yolk middle.

While waiting for dinner, Luna and her cousin discover they have a real mystery on their hands; someone is stealing the mooncakes. And the sweet treats are disappearing one by one!

Luna and Mina do the detective work and begin searching for clues. They find handprints, a blue thread, and a lost shoe. These clues help them methodically eliminate suspects as they postulate who could have swiped the cakes.

"Could it be big brother Kai?"

"Brother Benji?"

"Or maybe even a grown-up?"

Through careful observation and logic, they ultimately discover the culprit. But, you'll have to read the book to find out who it was.

Children are natural detectives. They love following clues and making predictions.

This book seamlessly weaves mathematical thinking into an entertaining story. Part of Charlesbridge's "Storytelling Math" series (see the feature photo for other covers and titles), the book introduces young readers to logic, reasoning, and the process of elimination. These are all essential mathematical skills; and the author does a great job of showing readers without making it feel too much like a lesson.

Four picture books from Charlesbridge's Storytelling Math series fanned out on a chair: Lia and Luís, El tesoro de bayas de Beto, Tyson, el pequeñito, and Luna and the Case of the Missing Mooncakes
Luna joins a growing shelf of Storytelling Math titles from Charlesbridge, several also available in Spanish editions.

Children are natural detectives. They love following clues and making predictions. The learning for parents is to foster natural curiosity and even find opportunities to coach it into logical reasoning.

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Tips for Reading Aloud
  • 1 Keep a suspect list as you read. Write the suspects on chart paper or a whiteboard (Kai, Benji, the cousins, the grown-ups) and cross names off as the clues rule them out, so students watch the process of elimination happen.
  • 2 Stop at each clue. When Luna and Mina find the handprints, the blue thread, and the lost shoe, pause and ask who each clue could point to and who it lets off the hook.
  • 3 Hold the reveal. Before the final pages, take a quick class vote on who took the mooncakes and ask students to name the clue behind their guess.
  • 4 Read the author's note. The backmatter explains when and why the Mid-Autumn Festival is celebrated and connects the detective work in the story back to math.
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Discussion Questions

What clues did Luna and Mina find? Which clue would you want to look at first?

PreK – K

What foods does your family like to share when everyone gets together?

PreK – K

How did one clue help Luna and Mina decide that someone did not take the mooncakes?

Grades 1–2

If a crayon went missing in our classroom, what clues could you look for to find it?

Grades 1–2