| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Okrucienstwo | Hardcover | 978-83-7544-634-0 | 2013 |
| Surrounded by Idiots: The Four Types of Human Behavior and How to Effectively Communicate with Each in Business | Paperback | 978-1-250-17993-7 | 2020 |
| Surrounded by Idiots: The Four Types of Human Behavior and How to Effectively Communicate with Each in Business | Hardcover | 978-1-250-17994-4 | 2019 |
| Thomas Erikson - Zludzenie | Paperback | 978-83-7544-439-1 | 2012 |