| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| project gutenberg science fiction bookshelf | 1.82 | 0.8 | 3140 | 99 |
| gutenberg project australia science fiction | 0.88 | 0.3 | 5096 | 88 |
| project gutenberg sci fi | 0.26 | 0.2 | 2020 | 69 |
| project gutenberg historical fiction | 0.1 | 0.9 | 509 | 30 |
| free books project gutenberg | 0.98 | 0.3 | 7521 | 39 |
| read free books project gutenberg | 0.35 | 0.7 | 5840 | 100 |
| gutenberg project book library | 1.95 | 0.2 | 5267 | 84 |
| gutenberg project books online | 1.79 | 0.6 | 2743 | 80 |
| project gutenberg free pdf books | 1.93 | 0.8 | 3679 | 54 |
| books free online project gutenberg | 1.23 | 0.7 | 9547 | 45 |
| best books on project gutenberg | 1.89 | 0.9 | 3523 | 10 |
| free book sites project gutenberg | 1.25 | 0.2 | 4297 | 36 |
| downloadable books on project gutenberg | 0.92 | 0.3 | 4577 | 33 |
| gutenberg project short stories | 0.43 | 0.3 | 4201 | 52 |
