In summary, the user needs options to access Dejan Lucić's books legally, possibly in PDF or EPUB. The answer should outline steps to find them legally, mention possible platforms, and caution against piracy. Maybe also suggest checking with local libraries or Serbian publishing websites. I should avoid providing direct links to pirated sites to stay within policy guidelines.
I need to remind the user about copyright laws. If his books are still under copyright, downloading them for free without permission is illegal. My response must not encourage piracy. Instead, suggest legal alternatives like purchasing from legitimate retailers, using public libraries, or checking if the books are available in public domain.
The user wants PDFs and EPUBs, so they're probably looking for a way to legally access his books. I should check if his works are available in Serbian or other languages. Maybe some of his books are translated, but the user might need to download them. But I have to be careful here because promoting piracy sites or enabling illegal downloads is against policy.
I should also check if there are Serbian publishing houses that have digitized his books. Maybe the user is trying to find rare or out-of-print works. They might not be aware of the legal restrictions, so it's important to guide them towards proper channels.
Are there any Serbian digital libraries or academic resources? The National Library of Serbia might have digitized some books. Additionally, sites like Internet Archive sometimes preserve books, but I need to verify if they have legal access.