Categories
| Category | Fiction? | # of Books | # of Authors |
|---|---|---|---|
| Altered States | 3 | 3 | |
| Biology | 1 | 1 | |
| Business | 13 | 13 | |
| Cognition | 8 | 8 | |
| Critical Thinking | 4 | 3 | |
| Culture | 6 | 5 | |
| Current Era Fiction | X | 3 | 3 |
| Design | 2 | 2 | |
| Economics | 6 | 5 | |
| Evolution | 2 | 2 | |
| Fantasy | X | 11 | 7 |
| Gothic | X | 3 | 3 |
| History | 9 | 9 | |
| Humor | X | 4 | 4 |
| Life Hacking | 2 | 2 | |
| Mathematics | 3 | 1 | |
| Mythology | 1 | 1 | |
| Period Fiction | X | 1 | 1 |
| Politics | 2 | 2 | |
| Science | 4 | 4 | |
| Sci Fi | X | 26 | 17 |
| Software | 2 | 2 | |
| Thriller | 1 | 1 | |
| Writing | 3 | 3 |