H. P. · H. Peter · Heather Peter and Heather Larson and David and Claudia Arp · Peter Heather
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Imperia i barbarzyncy | 978-83-7510-281-9 (83-7510-281-4) | 2010 |
| Odrodzenie Rzymu | 978-83-7818-410-2 (83-7818-410-2) | 2014 |
| Upadek Cesarstwa Rzymskiego | 978-83-7301-735-1 (83-7301-735-6) | 2014 |