Hilda and the Mountain King

We rejoin our heroine for her latest adventure just as she awakes to find herself... in the body of a troll! Her mum is worried sick, and is perplexed by the strange creature that seems to have taken Hilda's place. Now, both of them are in a race to be reunited before Ahlberg and his safety patrol get the chance to use their new secret weapon to lay waste to the trolls, and Hilda along with them! Available in softcover and hardcover editions.