| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| books about the prison system | 1.09 | 1 | 1693 | 93 |
| books about american prison system | 1.11 | 0.9 | 5036 | 25 |
| books written in prison | 0.67 | 1 | 6465 | 18 |
| books about being in prison | 1.54 | 0.2 | 7244 | 57 |
| books for people in prison | 1.2 | 0.9 | 471 | 83 |
| popular books in prison | 1.09 | 0.4 | 8028 | 38 |
| books for prison inmates | 1.82 | 0.3 | 9025 | 38 |
| books about prison life | 1.73 | 0.3 | 73 | 79 |
| fiction books about prison | 0.01 | 0.3 | 7275 | 91 |
| books on prison reform | 1.54 | 0.5 | 7340 | 5 |
| books read in prison | 0.49 | 0.5 | 5344 | 75 |
| books written by prison inmates | 0.35 | 0.1 | 6838 | 78 |
| books for prisons uk | 1.86 | 0.1 | 7304 | 2 |
| books written by prisoners | 1.19 | 0.7 | 6601 | 100 |
| books for prisoners program | 1.46 | 0.6 | 9713 | 31 |
| amazon books for prisoners | 0.36 | 0.9 | 8049 | 47 |
| books about private prisons | 0.55 | 0.1 | 9288 | 2 |
| books about inmates in prison | 0.46 | 0.4 | 2565 | 66 |
| books about prison reform | 1 | 0.6 | 184 | 9 |
| good books for people in prison | 0.81 | 0.9 | 8680 | 41 |
