| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| free kindle unlimited books mystery suspense | 0.59 | 0.4 | 2327 | 52 |
| free kindle unlimited books mystery | 0.59 | 1 | 6159 | 70 |
| kindle unlimited books free books mystery | 0.41 | 0.1 | 9362 | 8 |
| kindle unlimited free books mystery series | 1.73 | 1 | 778 | 39 |
