Auzou Book for the strange hoarder hill mansion

Bad surprise: Hedy and Spencer have to spend Christmas holidays at their grandfather's house. Since the disappearance of his wife during one of his performances, he has stopped doing magic... Today, he lives in an old, dusty house, hoarding so-called magical objects that are off-limits to touch... But when the children start receiving messages written in the dust, they realise they are facing real magic, and that someone is living within the walls of the house... could it really be the soul of their missing grandmother trapped, as the messages claim? And who is Nobody, this spirit who insists that their grandfather purposely caused his wife's disappearance? Determined to uncover the truth, the children team up with Stan, the stuffed deer head, and Doug, the bear skin rug, to free their grandmother... but in this magical world, how can they tell who their allies and enemies are?