| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| how many halo books are there | 0.12 | 0.7 | 1922 | 46 |
| how many halo books | 1.52 | 0.2 | 3490 | 69 |
| how many books in the halo series | 0.58 | 0.5 | 3895 | 12 |
| how many books are in the halo series | 0.54 | 0.9 | 8105 | 43 |
| are there halo books | 1.49 | 0.5 | 9426 | 39 |
| list of all halo books | 1.93 | 0.5 | 2529 | 96 |
| complete list of halo books | 0.7 | 0.1 | 6337 | 45 |
| all halo books in order | 1.43 | 0.1 | 1898 | 3 |
| list of halo books in order | 1.96 | 0.2 | 4821 | 41 |
| order of halo books | 1.12 | 0.9 | 4735 | 66 |
| halo books for sale | 1.72 | 0.8 | 8382 | 93 |
| halo books and games in order | 1.89 | 0.1 | 802 | 75 |
| halo books complete collection | 0.47 | 0.4 | 1919 | 73 |
| halo series books order | 0.42 | 0.1 | 6473 | 50 |
| all halo books pdf | 1.98 | 0.9 | 1706 | 54 |
| halo books in order of story | 0.5 | 0.6 | 6926 | 37 |
| halo book series list | 1.88 | 0.2 | 5816 | 75 |
