Luna and the Case of the Missing Mooncakes (Storytelling Math) 
Written by Natasha Yim  
Illustrated by Violet Kim 
Published by Charlesbridge 
Ages 3-6 
Available August 12, 2025 

It’s time to celebrate the Mid-Autumn Festival, and Luna is excited to celebrate with her family! When her favorite cousin, Mina, comes to Luna’s house, they’re both looking forward to eating the delicious mooncakes that Mina’s mom brought for dessert. While they wait for dinner to cook, the girls play detectives and quickly discover a real-life mystery to solve: someone is stealing the mooncakes one by one! Luna and Mina follow each clue, including handprints, a blue thread, and a lost shoe, to find the thief, ruling out suspects as they go. When they discover Mina’s little brother, Bei-Bei, is the thief, they’re proud that they solved the mystery and can continue celebrating the Mid-Autumn Festival. 

Natasha Yim’s newest installment in the Storytelling Math series creates a fun, intriguing story that showcases an important Chinese holiday. Yim’s interactive mystery encourages readers to consider clues alongside the girls to solve the case. At the same time, she showcases the Mid-Autumn Festival holiday and how it can be celebrated. Yim explains more in the backmatter, where she tells readers when the festival happens and why, as well as how the reasoning skills in this story are important in math. She suggests other reasoning activities, like figuring out how the eight remaining mooncakes can be shared amongst 10 people. Violet Kim uses gouache, crayon, and colored pencil to create modern cartoon-style illustrations. Their bright, full-color palette brings the mystery and celebration to life. Her illustrations support the text in encouraging paying attention to detail by showing visual hints, like who is wearing blue clothes. Both entertaining and educational, Luna and the Case of the Missing Mooncakes is great for supporting the development of critical thinking and reasoning skills.