Welcome to a school where glowing trails lead to caves, windows show no reflections, and sock puppets spill secrets. In The Riddle of Room 36 and Other Schoolyard Secrets, twelve sharp kids uncover the strange and puzzling mysteries hiding in everyday places—from the playground to the library basement. Who's sending glowing footprints through the woods? What's behind the multiplying classroom chairs? And how can one pen lead to a map written in midair? With each story, young detectives face riddles, whispering walls, blinking backpacks, and ghostly group chats. Each twist brings them closer to unlocking long-buried secrets—and learning just how much courage, curiosity, and clever thinking it takes to solve a real mystery. Perfect for readers aged 9–12 who love a little suspense, a few laughs, and a lot of fun.