Book Moles

We have a creature invading the house.  We believe it is a book mole.  You know, those small creatures that create little book mounds all over the place that seem to grow when no one is looking.  No one has actually seen the creature, but no one will claim the book piles as their own either.  So we either have a book mole, a reading ghost, or several avid readers who do not take the time to put their own books away and just keep adding to the already existing piles.  I am going to stick with the book mole.