Something is living beneath Whistle-by-the-Sea. And it's been waiting for the children to find it. Life in Whistle-by-the-Sea is calm, predictable, and just about perfect. The children share food, tell stories, and have never once dreamed of a world beyond their own...until their beloved rabbit vanishes down a strange hole in the woods. Deep beneath the island, they find a hidden world of living magical Coins, who are running out of time. Without the leaves of the Giggle-Me-Bum tree, they'll freeze up and stop breathing forever. The children are the only ones who can save them, and in return, the Coins will answer the children's biggest unanswered question: where did they really come from? But to find the Giggle-Me-Bum tree, the children must venture beyond the edges of their world. If they fail, the Coins die. If they succeed, nothing will ever be the same again. A funny, magical story for curious, brave readers. Perfect for fans of hidden worlds, big secrets, and even bigger adventures.