Closed for Ghosts: A Great Wall Junior Rangers Mystery

Tower 14 is CLOSED FOR GHOSTS.

Three bricks have vanished from the Great Wall of China. The tour guide says Ming soldiers are stealing them back. The village elders whisper warnings.

But 12-year-old Alex and 9-year-old Mia don't believe in ghosts. They believe in science.

When they sneak to the wall at midnight and watch a brick fall on its own - the ground beneath it wet and shining - they discover the real culprit isn't spirits. It's water. Gallons of it. From a resort with an infinity pool pointed straight at history.

With help from a local boy named Li Wei and his grandfather (the last traditional mason on the mountain), the kids build a case using watershed science, satellite images, and a very illegal food-coloring test. But when the resort manager steals their evidence, they have one night - and one storm - to prove the truth before Tower 14 collapses forever.

Young readers will discover:

• How the Great Wall was built (sticky rice mortar! rammed earth cores!)
• What watersheds are and why water always wins
• That regular kids can protect 600-year-old history

Includes a brick-stamp activity and an official Junior Ranger pledge.

Closed for Ghosts is Book 1 in the Junior Rangers Mystery series. Perfect for fans of Chasing Vermeer, City Spies, and From the Mixed-Up Files of Mrs. Basil E. Frankweiler.