| title | ISBN-13 | year of publication |
|---|---|---|
| Building People: Sunday Emails from a CEO | 978-1-118-46942-2 | 2013 |
| Building People: Sunday Emails from a CEO | 978-0-470-82290-6 | 2007 |
| Building People: Sunday Emails from a CEO, Volume 2 | 978-0-470-82790-1 | 2011 |
| Building People: Sunday E-Mails from a CEO, Volume 2 | 978-0-470-82985-1 | 2011 |
| Building People: Sunday Emails from a CEO, Volume 2 | 978-0-470-82786-4 | 2010 |