| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| best military sci fi book series | 1.14 | 0.7 | 9438 | 5 |
| best military sci fi series | 1.74 | 0.2 | 1834 | 6 |
| best military science fiction book series | 1.85 | 0.2 | 2944 | 68 |
| best military science fiction series | 1.62 | 0.8 | 8760 | 99 |
| free books sci fi military | 1.13 | 0.9 | 7394 | 25 |
| best sci fi series book | 0.45 | 1 | 9270 | 56 |
| best military fiction book series | 1.55 | 0.1 | 2550 | 10 |
| best military science fiction books | 0.68 | 1 | 3408 | 75 |
| best sci fi war books | 1.86 | 0.1 | 665 | 2 |
| top military science fiction books | 1.09 | 0.2 | 7708 | 23 |
| best sci fi war novels | 1.44 | 0.2 | 6812 | 21 |
| best military science fiction | 1.05 | 0.8 | 3675 | 14 |
