| title | ISBN-13 | year of publication |
|---|---|---|
| Crossroad 1 | 978-4-253-19291-0 | 2003 |
| Crossroad 2 | 978-4-253-19292-7 | 2003 |
| Crossroad 3 | 978-4-253-19293-4 | 2004 |
| Crossroad 4 | 978-4-253-19294-1 | 2004 |
| Crossroad 5 | 978-4-253-19295-8 | 2005 |
| Crossroad 6 | 978-4-253-19296-5 | 2005 |
| Crossroad 7 | 978-4-253-19297-2 | 2005 |