When Molly is plunged back into the magical Undersea Kingdom, she finds the Merqueen waiting with bad news - the Dark Queen Carlotta is back, and it is she who has been hiding sea creatures away and stealing their powers. Now it's a race against time to track down the animals that are still lost. Hearing a rumour of a strange egg on a tropical beach, Molly joins forces with Animal-Keeper mermaid Shanti to see if the turtles are trapped inside it. But even if they can get hold of the egg, they still have to escape Carlotta's terrifying guards - this time in the shape of skeletal coral monsters. 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.