| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| best free audio librivox books | 1.95 | 0.6 | 7399 | 63 |
| librivox free audio books app | 0.2 | 0.6 | 5520 | 79 |
| librivox free audio books youtube | 0.61 | 0.3 | 6667 | 57 |
| purchase audio books online from librivox | 1.06 | 0.9 | 566 | 27 |
| librivox audio books free app for fire | 1.71 | 0.7 | 9641 | 25 |
