Ghosts in the House! by Kazuno Kohara

A little girl moves into a house that happens to be haunted, but there’s no cause for alarm because she happens to be a witch and she knows just what to do. She puts on her witch’s hat, and her white cat puts on his black cat costume, and together they catch all the ghosts in the house, stuff them into a hamper, wash them in the washing machine and then put them to work around the house as curtains, table cloths and sheets. The illustrations are beautiful and all of the ghosts are printed in barely transparent white ink, so you can see through them. This is one of my favorites.