The anime My Neighbour Totoro introduces small black soot sprites, apparently called Susuwatari.
Around 8 minutes 42-45 seconds into the movie (German DVD edition), when the family checks out their new home and the girls ask their father about the spirits while they are looking around the bathroom, the father identifies them as "soot sprites" and in response the older girl asks whether they are the same like "in the picture book" (or storybook).
I'd like to know what book she's referring to. Does it exist at all, seeing that the sprites were - according to Wikipedia - invented by the story's author/director Hayao Miyazaki.
I'm mainly looking for canon answers, or answers referring to traditional Japanese legends.