More in the sparkly series for young readers about underwater magic and adventure. This book continues the resourceful and brave mermaids' quest to find stolen Snow Diamonds.
On the young mermaids' route to finding the second Snow Diamond they discover that a baby polar bear and walrus have gone missing from their families and Katie and her friends vow to help find them. In gratitude, the chief walrus helps the mermaids to unravel the riddle which Mantora has devised to stall them in their quest for the next Snow Diamond mission.
