Secret Kingdom: Magic Seal : Book 20 by Rosie Banks

The Snowy Seas are home to the Ice Mermaids, who love and care for all the animals that live there. But something's made the mermaids cruel and unkind - it must be Queen Malice's spell! Can Summer, Ellie and Jasmine find the Seal Keeper and return her kindness charm before the mermaids' kind nature is lost forever?
Binding: Paperback / softback