--------+----+----+----+----+----+----+----+----+----+ s |
| Myths and |----|----|----|++++|++++|++++| | | | |
| Classic |----|----|----|++++|++++|++++| | | | a |
| Literature |----|----|----|++++|++++|++++| | | | |
----------------+----+----+----+----+----+----+----+----+----+ G |
| Legendary | | |----|++++|++++|++++| | | | u |
| Heroes | | |----|++++|++++|++++| | | | i |
| | | |----|++++|++++|++++| | | | d |
----------------+----+----+----+----+----+----+----+----+----+ e |
| |----|----|----|----|----|----|++++|++++|----| |
| Biography |----|----|----|----|----|----|++++|++++|----| f |
| |----|----|----|----|----|----|++++|++++|----| o |
----------------+----+----+----+----+----+----+----+----+----+ r |
| Travel and | | | |----|----|----|----|++++|----| |
| Adventure | | | |----|----|----|----|++++|----| P |
| | | | |----|----|----|----|++++|----| a |
----------------+----+----+----+----+----+----+----+----+----+ r |
| | | | |----|----|----|----|++++|++++| e |
| History | | | |----|----|----|----|++++|++++| n |
| | | | |----|----|----|----|++++|++++| t |
----------------+----+----+----+----+----+----+----+----+----+ s, |
| Biblical, |----|----| |----|----|----|----| |----| |
| Moral, |----|----| |----|----|----|----| |----| T |
| Religious |----|----| |----|----|----|----| |----| e |
----------------+----+----+----+----+----+----+----+----+----+ a |
| | | |----|----|----|----|----|++++|++++| c |
| Patriotism | | |----|----|----|----|----|++++|++++| h |
| | | |----|----|----|----|----|++++|++++| e |
----------------+----+----+----+----+----+----+----+----+----+ r |
| |----|----|----|----|----|----|++++|----|----| s |
| Nature |----|----|----|----|----|----|++++|----|----| |
| |----|----|----|----|----|----|++++|----|----| a |
----------------+----+----+----+----+----+----+----+----+----+ n |
| |----|----|----|----|----|----|----|----|----| d |
| Humor |----|----|----|----|----|----|----|----|---