| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| authors that appeared on castle | 1.61 | 0.2 | 1216 | 74 |
| authors who appeared on castle | 1.81 | 0.8 | 3025 | 33 |
| real authors on castle | 1.92 | 0.4 | 8959 | 31 |
| mystery writers that appeared on castle | 1 | 0.1 | 2524 | 32 |
| who writes the castle books | 1.16 | 0.3 | 550 | 85 |
| author of the castle | 1.26 | 0.9 | 6055 | 56 |
| castle episode with famous authors | 1.56 | 0.9 | 8901 | 90 |
| who wrote the castle books | 1.37 | 0.5 | 8584 | 49 |
| famous crime authors in castle tv show | 1.79 | 0.4 | 1348 | 16 |
| authors in first episode of castle | 1.52 | 0.9 | 4950 | 1 |
| who wrote the castle | 0.29 | 0.8 | 9628 | 84 |
| books with castle in the title | 1.89 | 1 | 8797 | 83 |
| best books on castles | 1.35 | 0.5 | 21 | 66 |
| guest writers on castle | 0.9 | 0.1 | 6437 | 74 |
| who writes the richard castle novels | 0.99 | 0.4 | 2407 | 69 |
| who actually writes the richard castle books | 0.22 | 0.1 | 7170 | 23 |
| names of castle for books | 1.91 | 0.3 | 5671 | 71 |
| who wrote the richard castle novels | 1.01 | 1 | 3343 | 61 |
| who wrote richard castle books | 1.48 | 0.1 | 2008 | 33 |
| books on british castles | 1.13 | 0.8 | 5504 | 89 |
