| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| best space books of all time | 1.13 | 0.3 | 6426 | 83 |
| best space opera books of all time | 0.14 | 0.2 | 5497 | 89 |
| best space opera book series of all time | 1.34 | 0.9 | 394 | 56 |
| best books to read about space | 1.75 | 0.1 | 6510 | 20 |
| top 10 books about space | 0.04 | 0.9 | 4135 | 4 |
| best books on space and universe | 0.94 | 0.3 | 1287 | 25 |
| best space fiction books | 0.93 | 0.6 | 10000 | 59 |
| great books about space | 1.84 | 0.3 | 5727 | 56 |
| best books on space travel | 1.24 | 0.7 | 8068 | 38 |
| best books to learn about space | 1.68 | 1 | 5281 | 34 |
| best space books for kids | 1.56 | 0.3 | 1571 | 51 |
| best books about the space program | 1.4 | 0.7 | 2004 | 25 |
| best space adventure books | 1.93 | 0.9 | 4788 | 43 |
| best space books for beginners | 1.82 | 0.9 | 998 | 45 |
| best space books for adults | 0.36 | 0.8 | 9976 | 18 |
| good space books fiction | 0.59 | 0.7 | 6447 | 87 |
| best books on space and universe pdf | 1.31 | 0.4 | 7794 | 55 |
| best books for space lovers | 0.07 | 1 | 220 | 78 |
| best books on space exploration | 0.01 | 0.3 | 3889 | 5 |
| books related to space | 1.91 | 0.7 | 6126 | 35 |
| space books to read | 1.2 | 0.3 | 7637 | 85 |
| classic novels about space | 1.57 | 1 | 8394 | 93 |
