| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| One Life to Give: A Path to Finding Yourself by Helping Others | 978-1-61519-008-9 (1-61519-008-2) | 2010 | |
| Radykalna wdziecznosc | 978-83-61987-00-0 (83-61987-00-2) | 2014 | Mary Akers |
| The Greatest Gift: Lessons Learned From Exile in Siberia | 978-1-84739-446-0 (1-84739-446-9) | 2009 | " |
Medium · Simon & Schuster UK · The Experiment