| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| free audio books online project gutenberg | 1.58 | 0.8 | 6201 | 84 |
| free books online project gutenberg | 0.41 | 0.1 | 9310 | 44 |
| books online free to read project gutenberg | 0.64 | 1 | 483 | 36 |
| free downloadable books on project gutenberg | 1.58 | 0.6 | 9889 | 11 |
| microsoft gutenberg audio books | 1.3 | 0.8 | 8486 | 93 |
| read free books project gutenberg | 1.61 | 0.7 | 4935 | 69 |
| gutenberg project books online | 0.29 | 0.7 | 2717 | 54 |
| free books project gutenberg | 1.84 | 0.5 | 5705 | 90 |
| project gutenberg open audiobook collection | 0.54 | 0.3 | 6070 | 100 |
| downloadable books on project gutenberg | 0.16 | 0.2 | 8739 | 77 |
