| #2 |  Foundation
| 3.98 | 1,189 reads | |
| #3 |  Foundation and Empire
| 4.03 | 564 reads | |
| #4 |  Second Foundation
| 4.14 | 510 reads | |
| #5 |  Foundation's edge
| 3.96 | 281 reads | |
| #6 |  Foundation and Earth
| 3.8 | 229 reads | |
| #7 |  Prelude to Foundation
| 3.92 | 223 reads | |
| #8 |  Forward the Foundation
| 4.01 | 151 reads |