| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2006 | 978-0-9773444-0-6 | John Curtis | The Business of Love: 9 Best Practices for Improving the Bottom Line of Your Relationship |
| '' | 978-0-9773444-1-3 | John Curtis | "The Business of Love Workbook: 9 Best Practices for Improving the Bottom Line of Your Relationship" |
| 2008 | 978-0-9773444-2-0 | '' | Marriage Built to Last: 9 Steps to Life-long Love |