| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| free textbook sites project gutenberg | 0.99 | 0.1 | 4099 | 27 |
| free books online project gutenberg | 0.79 | 0.5 | 6532 | 85 |
| free books project gutenberg | 1.02 | 0.9 | 8042 | 12 |
| read free books project gutenberg | 0.87 | 0.6 | 1897 | 40 |
| books online free to read project gutenberg | 0.53 | 0.4 | 559 | 60 |
| project gutenberg free books download | 1.79 | 0.5 | 7034 | 71 |
| gutenberg project books online | 1.62 | 0.1 | 1409 | 91 |
| free downloadable books on project gutenberg | 1.5 | 0.1 | 3244 | 93 |
| free ebooks gutenberg project | 1.06 | 1 | 4327 | 57 |
| free ebook project gutenberg | 0.65 | 0.4 | 7244 | 47 |
| downloadable books on project gutenberg | 0.55 | 0.2 | 3575 | 34 |
| the gutenberg project website | 0.53 | 0.6 | 859 | 27 |
