The city of Trolberg has some dark secrets to reveal. and our favourite blue-haired adventurer is about to discover them!

The fourth in Luke Pearson's acclaimed series of magical adventures starring Hilda, our favourite blue-haired heroine - now in paperback! Hilda stumbles upon Tontu, a lost house spirit. Plunged into the secret world of the Nisse, Hilda discovers hidden passages that only the house spirits can navigate... and something has been ransacking them all!