I'm looking for a children's book from late 1950- mid 1970s. I thought it was called the upside down man. However, it is not either of the books by Ellentuck or Baker. It's about kids at home and their parents leave and tell them whatever you do if the door bell rings, don't open the door for the upside down man. But they let him in and he turns everything in the house upside down. It is done in line drawings, black and white. I think it was from a small publisher around Boston.