The Mystery of Locked Rooms (The Delta Games #1)

Three friends team up to find a hidden treasure in an abandoned 1940s fun house.

Twelve-year-old Sarah Kelley wants nothing more from her seventh-grade year than to beat the hardest escape room left in her town with her best friends West and Hannah. But when her house receives a foreclosure notice everything changes. After her father became ill two years ago, things have been bad, but she did not think they would become lose-your-house bad.

She feels helpless until the day Hannah mentions a treasure rumored to be hidden in the walls of an abandoned fun house. According to legend, Hans, Erik, and James Halloran were orphaned at eight years old and lived with different families until they were able to reunite as adults. Their dream was to build the best fun house in existence. They wanted the experience to be more than mirror mazes and optical illusions, so they not only created elaborate riddles and secret passages, but they also claimed to have hidden a treasure inside. Sarah, West, and Hannah decide to explore, but once in, they realize the house is unlike any escape room they've attempted.