Ada and the Ghost of Mouse. Chris Riddell

In the Drūmasu castle lives Ada Gota - a lonely girl whose father and the ghostly inhabitants of the castle don't quite understand her. One night, Ada encounters the ghost of a mouse named Ishmael. Their friendship leads to a series of secret adventures, uncovering the castle's mysteries, strange ghosts, a series of literary jokes, and a dangerous intrigue that Ada and Ishmael try to unravel. A fantastically witty, gothic, and warm story.