| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| best space opera series audio books | 0.15 | 1 | 3877 | 1 |
| best space opera books series | 1.34 | 1 | 1620 | 95 |
| the best space opera books | 1.76 | 0.7 | 5047 | 45 |
| space opera series books | 0.97 | 0.4 | 7033 | 72 |
| best space opera series | 1.53 | 0.4 | 6329 | 50 |
| best space opera books of all time | 0.7 | 0.7 | 9182 | 19 |
| top space opera books | 0.11 | 0.5 | 3636 | 1 |
| amazon space opera books | 0.04 | 0.4 | 4867 | 45 |
| best space opera science fiction books | 1.82 | 0.6 | 4489 | 40 |
| good space opera books | 0.43 | 0.2 | 2345 | 96 |
| top 10 space opera books | 0.62 | 1 | 6534 | 14 |
| top space opera book series | 1.62 | 0.5 | 5583 | 8 |
| best space opera novels | 0.87 | 0.7 | 8702 | 49 |
| best space opera books 2023 | 1.03 | 1 | 2523 | 92 |
| free space opera books | 0.07 | 0.4 | 7678 | 44 |
| best space opera novels of all time | 0.83 | 1 | 123 | 80 |
| greatest space opera novels | 0.94 | 0.3 | 8106 | 61 |
| great space opera novels | 1.85 | 0.1 | 6628 | 50 |
