F. Fialkoff's has led us to wonder about the most widely borrowed novels in public libraries and how they are promoted. We analysed the best lending statistics in three libraries in Lorraine (North-East France) and tried to identify the most frequently borrowed novels. This project led us to exchange ideas with librarians. We would like to find out about their presuppositions and thus, know more about libraries because we will know about librarians better. This study allows to compare how the librarians apprehend reading and how readers do. We would like to show the gap between the two representations.