The Best Spy Mystery Books for Children for 2026

On the following list we collected some of the best and new mystery books for children. Most of them are chapter books, but there are some illustrated adventures too.The list is live on Goodreads, feel free to add more books to it. Spy School Goes East, by Stuart Gibbs (2026)In the fourteenth book of Stuart Gibbs's New York Times bestselling Spy School series, superspy middle schooler Ben Ripley journeys to China to save the Hale family. The seasoned adult spies of the Hale family have mysteriously disappeared on a mission, so Ben and his fellow spies-in-training head east to find out what happened to them.They quickly find themselves up against a villainous plot that takes them from the skyscrapers of Shanghai to the ancient ruins of the Great Wall and the remote regions of the Gobi desert. Released in October 2026, it is a fast, funny adventure for readers aged 8 to 12, and a great place for fans of the series to catch up. Spy Grandma, by Celina Frenn (2026)The last thing Jamie wants to do with her summer is spend it at Grandma's house, and her mom did not ask for her opinion. The last thing Grandma expected was to be ambushed by escaped criminals she brought to justice during he...