Mr. NotThere Post-its

There is a moving truck parked in front of the building where Claudia lives. A new neighbor! What is he like? What does he do? Why does he live alone? The enigmatic neighbor has arrived with a shipment of boxes of books and Claudia has set out to discover who he is. But it will not be easy. The neighbor seems never to be at home. After a week, all she knows is that she communicates with Post-its. How must someone be who in mobile times still sends paper notes?
 
A mysterious story of Post-its coming and going on the stair landing!