| title | ISBN-13 | year of publica- tion |
|---|---|---|
| Book-keeping Made Easy | 978-1-905261-42-0 | 2006 |
| Book-keeping Made Easy | 978-1-904053-85-9 | 2005 |
| Book-Keeping Made Easy | 978-1-904053-06-4 | 2002 |
| Debt Collection Made Easy | 978-1-902646-42-8 | 1999 |
| Earning & Keeping Customer Loyalty Made Easy | 978-1-902646-57-2 | 2000 |
| Running Your Own Business Made Easy | 978-1-905261-05-5 | 2006 |
| Running Your Own Business Made Easy | 978-1-904053-26-2 | 2002 |
| Running Your Own Business Made Easy | 978-1-902646-47-3 | 2000 |
| Running Your Own Business Made Easy Software | 978-1-902646-66-4 | 2000 |