| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| project gutenberg science fiction bookshelf | 1.26 | 0.5 | 6803 | 66 |
| gutenberg project australia science fiction | 1.7 | 0.6 | 4054 | 96 |
| project gutenberg sci fi | 0.79 | 0.8 | 8922 | 42 |
| project gutenberg historical fiction | 0.85 | 0.1 | 5681 | 95 |
| free books project gutenberg | 0.19 | 0.1 | 256 | 45 |
| read free books project gutenberg | 1.37 | 0.4 | 6554 | 55 |
| gutenberg project book library | 1.52 | 0.2 | 5487 | 81 |
| gutenberg project books online | 0.77 | 0.5 | 2442 | 29 |
| project gutenberg free pdf books | 1.61 | 0.8 | 7160 | 97 |
| books free online project gutenberg | 0.58 | 0.6 | 8084 | 8 |
| best books on project gutenberg | 1.25 | 1 | 1845 | 34 |
| free book sites project gutenberg | 0.39 | 0.1 | 8029 | 84 |
| downloadable books on project gutenberg | 1.95 | 0.4 | 6819 | 60 |
| gutenberg project short stories | 1.66 | 0.5 | 5431 | 69 |
