Hilda finds her world turned upside down as she faces the prospect of leaving her snow-capped birthplace for the hum of the megalopolis. Her mother, an architect, has been offered a prestigious position in the bustling metropolis that she would find hard to reject. Besides, the tiny elven creatures making a daily habit of bombarding them with threats isn't making Hilda's case any better. As she seeks ways to stall her mother's decision, Hilda rushes...

"The city of Trolberg has yet more secrets to unravel in an adventure where Hilda discovers her world is not quite held together in the way she thought it was. Hilda is sat in her tent, dwarfed by volumes of the Greater Fjords Wildlife Chronicles with a flashlight and her restless companion, Twig. But Hilda's not in the Fjords and it isn't raining. Hilda's pitched a tent in her room and it's been days since she's been out. In Hilda's new adventure,...

"We rejoin our heroine for her latest adventure just as she awakes to find herself ... in the body of a troll! Her mother 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!"--Provided by publisher.