Do the books look white or orange?
The books are orange.
    src        edge_attr  dst
0     0  to the right of    6
1     0  to the right of   14
2     1   to the left of    8
3     1   to the left of    5
4     1   to the left of   10
5     1   to the left of    3
6     1   to the left of    4
7     3  to the right of    1
8     3  to the right of   15
9     4  to the right of    1
10    4  to the right of   12
11    4  to the right of   13
12    5  to the right of   12
13    5  to the right of   13
14    5  to the right of    1
15    6             with    2
16    6             with    9
17    6   to the left of    0
18    6   to the left of    9
19    7  to the right of   12
20    7  to the right of   13
21    8  to the right of   12
22    8  to the right of   13
23    8  to the right of    1
24    9  to the right of    6
25   10  to the right of    1
26   12   to the left of    5
27   12   to the left of    4
28   12   to the left of    8
29   12   to the left of    7
30   13   to the left of    5
31   13   to the left of    4
32   13   to the left of    8
33   13   to the left of    7
34   14   to the left of    0
35   15   to the left of    3