| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Making Sense of Sex: Responsible Decision Making for Young Singles | 978-0-664-23337-2 (0-664-23337-6) | 2011 |
| The Skeptical, Passionate Christian: Tools for Living Faithfully in an Uncertain World | 978-0-664-23008-1 (0-664-23008-3) | 2006 |
M. D. · M. Duffy · M. F. · Michael D. · Michael Duffy · Michael F.