| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| best space opera series books | 1.88 | 1 | 9979 | 26 |
| best space opera series audio books | 1.32 | 0.3 | 5261 | 51 |
| best new space opera books | 0.22 | 0.2 | 5750 | 73 |
| space opera book series | 0.97 | 0.5 | 8108 | 53 |
| good space opera books | 1.39 | 1 | 3691 | 40 |
| best selling space opera books | 1.42 | 0.2 | 3001 | 60 |
| best space opera audio books | 0.15 | 0.9 | 7902 | 80 |
| space opera novel series | 0.13 | 1 | 1516 | 39 |
| recent space opera books | 0.49 | 0.8 | 4625 | 95 |
| greatest space opera novels | 1.26 | 0.2 | 5014 | 96 |
| great space opera books | 1.61 | 1 | 6688 | 45 |
| space opera books 2017 | 0.54 | 0.9 | 618 | 80 |
| good modern space opera books | 0.82 | 0.5 | 1807 | 4 |
