| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| best space opera audio books | 1 | 0.8 | 3697 | 66 |
| best space opera series audio books | 1.66 | 0.8 | 710 | 4 |
| best space opera books | 1.19 | 0.6 | 7728 | 60 |
| best rated space opera books | 1.75 | 0.9 | 3912 | 44 |
| best space opera books series | 0.87 | 0.8 | 5008 | 60 |
| best space opera books of all time | 0.48 | 0.7 | 2761 | 47 |
| top space opera books | 0.22 | 0.5 | 6764 | 86 |
| good space opera books | 1.99 | 0.5 | 5848 | 56 |
| best space opera novels | 0.16 | 0.9 | 804 | 47 |
| best selling space opera books | 0.93 | 0.1 | 3885 | 45 |
| space opera audiobooks reddit | 1.17 | 0.9 | 6754 | 22 |
| free space opera books | 0.94 | 0.9 | 1269 | 85 |
| recent space opera books | 1.07 | 0.6 | 282 | 24 |
| great space opera books | 0.07 | 1 | 878 | 53 |
| best space opera series | 1.96 | 0.5 | 6337 | 74 |
| the very best published space opera | 1.88 | 0.9 | 2636 | 68 |
| greatest space opera novels | 0.25 | 0.2 | 2893 | 92 |
