| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| kindle unlimited free books science fiction | 1.32 | 0.8 | 1154 | 29 |
| kindle free science fiction books | 0.57 | 0.3 | 1300 | 61 |
| kindle unlimited free books sci fi | 0.71 | 0.5 | 8672 | 41 |
| kindle unlimited science fiction and fantasy | 0.4 | 0.5 | 9477 | 75 |
| kindle unlimited hard science fiction | 0.55 | 0.8 | 1663 | 28 |
| kindle free science fiction | 1.43 | 0.6 | 6832 | 35 |
| kindle unlimited sci fi books | 1.81 | 0.5 | 583 | 7 |
| free science fiction and fantasy kindle books | 0.3 | 0.1 | 221 | 54 |
| free kindle books science fiction and romance | 1.7 | 0.7 | 4564 | 45 |
