Peter Zajac · Piotr Zajac · Piotr Ziecik · Zychowicz Piotr
| title | ISBN-13 | year of publication |
|---|---|---|
| Obled '44 | 978-83-7818-441-6 | 2015 |
| Obled 44 | 978-83-7818-482-9 | 2014 |
| Opcja niemiecka | 978-83-7818-620-5 | 2014 |
| Pakt Pilsudski-Lenin | 978-83-7818-770-7 | 2015 |
| Pakt Ribbentrop Beck | 978-83-7510-921-4 | 2018 |