Which side of the picture are the books on?
The books are on the left of the image.
     src        edge_attr  dst
0      0  to the right of   20
1      0  to the right of   29
2      0  to the right of    5
3      0  to the right of    4
4      0  to the right of   16
..   ...              ...  ...
200   33  to the right of    8
201   33  to the right of   13
202   34  to the right of   13
203   34  to the right of   12
204   34               on   10

[205 rows x 3 columns]