This book published by Collins doesn't muck about! Can anyone see a next step I can take to solve the rest of this puzzle?
*--------------------------------------------------*
| 8 9 457 | 457 37 2 | 3567 467 1 |
| 6 3 2 | 4579 79 1 | 8 47 59 |
| 14 1457 1457 | 45789 6 34578 | 357 2 359 |
|----------------+-----------------+---------------|
| 2 1568 1358 | 168 4 9 | 1356 168 7 |
| 13 1568 9 | 1678 2 678 | 4 168 35 |
| 7 1468 148 | 3 5 68 | 16 9 2 |
|----------------+-----------------+---------------|
| 9 2 34-17 | 45-7 8 345-7 |*17 *17 6 |
| 134 147 6 | 2 137 347 | 9 5 8 |
| 5 178 178 | 679 179 67 | 2 3 4 |
*--------------------------------------------------*
*--------------------------------------------------*
| 8 9 457 | 457 37 2 | 3567 467 1 |
| 6 3 2 | 4579 79 1 | 8 47 59 |
| 14 1457 1457 |#45789 6 345-78 | 357 2 359 |
|---------------+-------------------+--------------|
| 2 1568 1358 | 168 4 9 | 1356 168 7 |
| 13 1568 9 | 1678 2 *678 | 4 168 35 |
| 7 1468 148 | 3 5 *68 | 16 9 2 |
|---------------+-------------------+--------------|
| 9 2 34 | 45 8 345 | 17 17 6 |
| 134 147 6 | 2 137 34-7 | 9 5 8 |
| 5 178 178 | 679 179 *67 | 2 3 4 |
*--------------------------------------------------*