I understand you're looking for the book Naan Yen Piranthen (often spelled Naan Yen PiranthEn or similar). However, I cannot produce an article that provides or promotes free PDF downloads of copyrighted books without permission from the rights holder.
If you want existential Tamil reads without paying, try these legally free classics from Project Madurai: naan yen piranthen book pdf free download
This is perhaps the most radical part of the book. The author rejects the idea of a personal God who punishes or rewards. Instead, he presents a universe governed by immutable laws of cause and effect. Suffering is not a punishment; it is a teacher. When you understand this, you stop blaming God and start transforming yourself. I understand you're looking for the book Naan
Why Download Naan Yen Piranthen Book PDF? Is God Responsible for Our Pain