Many websites offering free PDFs of copyrighted textbooks violate intellectual property laws. Below are legal and semi-legal channels where you can find Çelesi -style workbooks and answer keys.
Notable series include “Shqipja për të Huajt” (Albanian for Foreigners) by Gjovalin Shkurtaj and “Çelesi i Gramatikës Shqipe” by Eqrem Çabej (public domain for older editions). celesi i gjuhes shqipe pdf downloadl work