| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2004 | 978-0-9753306-0-9 | David F. Allen | Contemplation: intimacy in a distant world |
| '' | 978-0-9753306-1-6 | David F. Allen | In Search Of The Heart |
| '' | 978-0-9753306-2-3 | '' | Shattering the Gods Within |
| '' | 978-0-9753306-3-0 | Gail L. Thompson David F. Allen | In Search of the Heart Workbook |