| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Grace Meets Grit: How to Bring Out the Remarkable, Courageous Leader Within | 978-1-62956-139-4 (1-62956-139-8) | 2016 |
| Marketing in the Participation Age: A Guide to Motivating People to Join, Share, Take Part, Connect, and Engage | 978-1-118-40230-6 (1-118-40230-8) | 2012 |