| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1987 | 978-0-915212-00-2 | Richard Bowker | Wordbook 1 (Vocabulary Building Program, Vocabulary Scale 51-63) |
| 2001 | 978-0-915212-01-9 | Wordbook 2 | |
| 1988 | 978-0-915212-07-1 | Richard Bowker | Wordbook 7 |
| '' | 978-0-915212-08-8 | '' | Wordbook 8 |
| 1997 | 978-0-915212-09-5 | Junior Wordbook D | |