Agathiyar is revered as the father of the Tamil Siddha medicine system. His extensive works form the bedrock of Siddha pharmacology and spiritual philosophy. Here are some of his key texts available for free download as PDFs:
Known as the father of Siddha medicine, Agathiyar's works including Agathiyar 1200 and Agathiya Karukkadai are fundamental. siddhar books in tamil pdf