Deep in the sand of Coral Cove, an ancient secret has been waiting. When Josh and his best friend, Maya, unearth a barnacle-encrusted wooden box, they discover more than just an old relic, they find a cryptic, faded map that holds the key to a legend whispered for centuries: the vanished hoard of Captain Red-Heart, the bravest pirate queen to ever sail the seven seas. But this isn't a treasure of simple gold. It's protected by clever traps, guarded by a grumpy lighthouse keeper, and hidden in places only a true adventurer could find.

Their quest immediately plunges them into danger: Can they decipher the mysterious Whistle in the Waves and wake the sleeping ship, the Sea Serpent Will they survive the churning chaos of the Shimmering Sargasso and the terrifying fury of a tropical storm? And most dangerously of all, can they outrun the menacing Captain Black-Fin, who will stop at nothing to claim the treasure for himself? Dare to sail with Josh and Maya into the Jumbled Jungle and the silent, sunken city. Every twist, every riddle, and every heart-stopping moment brings them closer to the Vault of the Emerald Key, and closer to discovering that the Pirate Queen’s true legacy is far more precious than they could ever imagine. The adventure is calling. Are you brave enough to answer?