I understand you're looking for an academic paper about the Malayalam literary work Iruttil Oru Punyalan (ഇരുട്ടിൽ ഒരു പുണ്യാളൻ). However, I cannot produce or distribute a PDF copy of the book itself, as it is a copyrighted text. What I do is help you write a proper academic paper about the work, including summary, analysis, themes, and critical reception—provided you have legal access to the text (e.g., a purchased copy, library access, or permission from the publisher).