| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| best space opera audio books | 0.03 | 0.3 | 1069 | 15 |
| best space opera series audio books | 0.66 | 0.8 | 3774 | 75 |
| best space opera books | 1.77 | 0.5 | 1034 | 25 |
| best space opera books series | 0.1 | 0.2 | 1329 | 98 |
| best space opera books of all time | 0.67 | 0.9 | 2823 | 32 |
| top space opera books | 1.8 | 0.7 | 4979 | 76 |
| good space opera books | 1.55 | 0.2 | 9760 | 56 |
| top 10 space opera books | 1.24 | 0.2 | 9065 | 40 |
| amazon space opera books | 0.47 | 0.9 | 9806 | 3 |
| best space opera novels | 0.34 | 0.3 | 2826 | 82 |
| best space opera science fiction books | 1.56 | 0.3 | 1703 | 52 |
| free space opera books | 0.65 | 0.4 | 3737 | 77 |
| best space opera books 2023 | 0.74 | 1 | 2764 | 23 |
| best space opera series | 0.22 | 0.7 | 1916 | 1 |
| best space opera novels of all time | 0.79 | 0.3 | 6056 | 78 |
| greatest space opera novels | 0.49 | 0.2 | 412 | 65 |
| top space opera book series | 0.86 | 0.5 | 271 | 53 |
| great space opera novels | 1.95 | 0.6 | 1817 | 4 |
