| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| robert a heinlein written works | 1.34 | 1 | 9581 | 84 |
| complete works of robert heinlein | 0.17 | 0.4 | 3553 | 74 |
| books by robert heinlein | 0.03 | 0.1 | 8688 | 27 |
| robert a heinlein book list | 1.21 | 0.7 | 9602 | 61 |
| robert a. heinlein books | 1.14 | 1 | 1955 | 38 |
| robert a heinlein short stories | 1.7 | 0.8 | 597 | 43 |
| robert a heinlein pdf | 1.79 | 0.9 | 8487 | 13 |
| robert a heinlein biography | 0.56 | 0.4 | 7863 | 4 |
| free robert heinlein books | 0.3 | 0.2 | 1024 | 51 |
| robert heinlein books to read | 0.34 | 1 | 1789 | 70 |
| robert heinlein books online free | 0.17 | 0.6 | 8281 | 6 |
| list of robert heinlein books | 1.04 | 0.1 | 6367 | 6 |
