Many sea creatures have suddenly gone missing from the oceans and Molly the Secret Mermaid is determined to help her friends, the Animal-Keeper mermaids, find them all. The seals have reported strange, distant dolphin noises, so Molly and Aisha, the dolphin mermaid, go to investigate. But when they discover a magical shell with the thousands of tiny dolphins trapped inside, the mermaids have no idea how to release them. Worse still, they must first rescue the shell from the clutches of a terrifying sand monster - but it seems Molly's special animal-charm necklace might hold a secret power that could help. Readers will be enchanted by Molly the Secret Mermaid's daring ocean quests, full of gorgeous undersea detail and captivating characters, in this dazzling series for budding mermaids everywhere.