I want books written in English.
This is exactly what I meant.
Better go to the Wojewódzka Biblioteka Publiczna, Narutowicza 4. You may even browse their books online here:
lubicz3.wbp.lublin.pl:8080/search/query?facet_lang=eng&sort=dateCreated&theme=system
Another option would be Miejska Biblioteka Publiczna, Peowiaków 12
mbp.lublin.pl/index.php?option=com_content&task=view&id=39&Itemid=143
Both libraries seem not to be far away from the Graniczna street.