| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| English Steps 1 | 978-0-521-64690-1 | 1999 | Peta Heywood |
| English Steps 2 | 978-0-521-64691-8 | 1999 | " |
| English Steps 3 | 978-0-521-64692-5 | 1999 | " |
| English Steps 4 | 978-0-521-64693-2 | 2000 | " |
| English Steps 5 | 978-0-521-64694-9 | 2000 | " |
| English Steps 6 | 978-0-521-64695-6 | 2000 | " |