Some schools have hidden lockers.
Lincoln Elementary has a hidden world.

When sixth-grader Theo Ellis spins the old classroom globe one rainy afternoon, he doesn't expect it to pop open — or to find a dusty, hand-drawn map tucked inside. Even stranger? The map doesn't lead to anywhere above ground. It points below.

Together with his best friends, book-smart Zoe and daredevil Marco, Theo sets out to follow the clues. But what starts as a harmless after-school adventure quickly leads them deep beneath their school... into tunnels that seem much older than the town itself.

Down there, the trio discovers forgotten chambers, strange machines, and a mystery that no teacher, no parent, and no history book ever mentioned. Something was hidden — something important — and it's been waiting a long time to be found.

But they're not the only ones looking.

As secrets come to light and danger creeps closer, Theo and his friends must solve the map's riddles before the school's oldest secret is sealed away forever.

Funny, thrilling, and packed with puzzles and heart, The Map Beneath the School is a standalone middle-grade adventure perfect for fans of Trenton Lee Stewart's The Mysterious Benedict Society, Chris Grabenstein's Escape from Mr. Lemoncello's Library, and young readers who believe the best treasures are hidden right under their feet.

Some mysteries hide in plain sight.
Others hide just below it.