Do you see any boxes or books?
No, there are no books or boxes.
   src        edge_attr  dst
0    0   to the left of    3
1    2   to the left of    8
2    3  to the right of    0
3    6        on top of    5
4    6  to the right of    8
5    7        on top of    5
6    8        on top of    5
7    8  to the right of    2
8    8   to the left of    6