Used book – The Phantom with the Red Hand, Hélène Montardre, Hervé Duphot

Morgane, Ludo, and Gégé are all set for their nocturnal expedition to the Horns Dungeon. There, they discover a magnificent landscape... but also a bloody handprint on a wall! Even worse, they are confronted by a strange character wandering in the castle's underground passages. It is said that in the past an evil lord lived in these very places. So, ghost or flesh-and-blood being? Sometimes the truth is hard to accept...