From two-time Olympic bronze medalists Maia and Alex Shibutani comes a middle-grade mystery set at the Tokyo Olympics. Andy and Mika are going to Tokyo! The Kudo Kids have never been to Japan before, so they can't believe they get to attend the Summer Olympics there. The siblings plan to eat tons of delicious Japanese food, watch every event they can, and win a super-popular new game called OlympiFan. Developed by a mysterious former medalist, OlympiFan brings players together from all over the world to search Tokyo for virtual medals and clues to the secretive creator's identity. Andy loves puzzles, and he's determined to crack this one, especially since the winning team will get to be beta testers for the Masked Medalist's future games! Mika wants to find as many clues as she can, but she also has a secret goal of her own—one that could get her into big trouble. But when someone sabotages the game, the Kudo Kids have an even bigger mystery to solve than the Masked Medalist's identity. If they want to capture the gold, Mika and Andy have to figure out who's trying to stop their team before someone beats them to the grand prize!

Andy and Mika are about to take a bite out of the Big Apple. When the Kudo Kids travel to New York City for the first time, they're ready to hit the ground running and see the sights. But the siblings quickly realize that they're excited for very different reasons—Mika wants to take photos of iconic landmarks and visit a famous camera store, while Andy can't wait to try out an escape room that one of his friends told him about. Both of their plans get shaken up when they learn that Aunt Kei is in desperate need of assistance as she prepares for an important fashion presentation. Not wanting to pass up an opportunity to explore, Andy and Mika enthusiastically volunteer to help run errands with their cousin, Jenny. When a very special dress, the centerpiece of Aunt Kei's collection, goes missing, they find themselves on a chase around the city to find it in another unforgettable mystery that will leave readers guessing until the very end.