|  |  | 1 | $4.99
| Calculate | 13h 53m | |
| | | - | $6.95
| Calculate | 1d 14h 07m | |
| | | 1 | $24.99
| Free | 2d 18h 50m | |
| | | - | $2.00
| $3.50 | 2d 13h 14m | |
| | | - | $0.99
| $4.00 | 2d 06h 05m | |
|
| | | 1 | $0.99
| $4.00 | 2d 11h 40m | |
| | | - | $9.99
| $15.00 | 2d 16h 32m | |
| | | - | $2.99
| Calculate | 3d 14h 43m | |
| | | - | $9.99
| $7.00 | 3d 12h 46m | |
| | | - | $7.00
| $5.00 | 3d 18h 36m | |
| | | - | $12.49
| Not specified | 1d 20h 33m | |
| | | - | $39.95
| Not specified | 2d 12h 58m | |
|  | | - | $5.99
| $3.50 | 4d 01h 56m | |
| | | - | $2.50
| $8.12 | 4d 23h 26m | |
| | | - | $18.00
| Calculate | 4d 18h 36m | |
| | | - | $9.99
| Calculate | 4d 21h 51m | |
|
| | | - | $9.99
| $10.50 | 5d 13h 30m | |
| | | - | $9.99
| $10.50 | 5d 13h 32m | |
| | | - | $9.95
| $3.95 | 6d 09h 12m | |
| | | - | $9.99
| Calculate | 6d 09h 51m | |
| | | - | $9.95
| $3.95 | 6d 10h 03m | |
| | | - | $9.95
| $3.95 | 6d 12h 11m | |
| | | - | $9.95
| $3.95 | 6d 13h 47m | |
| Leinster, Heinlein, Hoyle, Clarke, Zelazny, Blish +
| | - | $2.49
| $3.50 | 6d 18h 24m | |
| | | - | $9.95
| $3.95 | 6d 14h 43m | |
| | | - | $11.25
| $6.99 | 6d 21h 36m | |
| | | - | $3.00
| $3.50 | 6d 20h 38m | |
