O's · Olaf Steffens · Olive Stevenson · Olof Staffans
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Be Your Own Guru: Personal and Business Enlightenment in Just 3 Days! | 978-1-84112-737-8 (1-84112-737-X) | 2006 |
| Be Your Own Guru: Personal and Business Enlightenment in Just 3 Days Olivia Stefanino | 978-81-265-1156-3 (81-265-1156-7) | 2007 |