| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| free space opera books | 1.93 | 0.3 | 6275 | 94 | 22 |
| free | 0.06 | 0.5 | 5316 | 75 | 4 |
| space | 1.02 | 0.9 | 4691 | 68 | 5 |
| opera | 1 | 0.4 | 4568 | 12 | 5 |
| books | 1.01 | 0.2 | 894 | 55 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| free space opera books | 1.68 | 0.8 | 6650 | 90 |
| free kindle space opera books | 1.79 | 0.7 | 1286 | 31 |
| free kindle books science fiction space opera | 1.13 | 0.6 | 4682 | 33 |
| space opera books series | 1.9 | 1 | 4844 | 50 |
| best space opera books | 0.2 | 0.8 | 3179 | 82 |
| recent space opera books | 1.07 | 0.3 | 468 | 17 |
| space opera books 2017 | 1.62 | 0.4 | 993 | 83 |
| good space opera books | 0.66 | 0.7 | 7209 | 70 |
| best rated space opera books | 0.02 | 0.9 | 3457 | 80 |
| great space opera books | 1.4 | 0.4 | 7144 | 33 |
| top space opera books | 0.35 | 0.1 | 6250 | 77 |
| best space opera audio books | 1.1 | 0.9 | 75 | 41 |
| best selling space opera books | 1.19 | 0.8 | 1906 | 86 |
| best space opera books of all time | 0.83 | 1 | 8487 | 61 |
| free space opera games | 0.31 | 0.6 | 1171 | 100 |
| space opera novel series | 1.39 | 0.6 | 2973 | 45 |
| best space opera novels | 0.77 | 1 | 9130 | 45 |
