You can find Siddhar books in Tamil PDF format through online repositories and websites, such as:
The are ancient Tamil sages, alchemists, and mystics who possessed profound knowledge of medicine, yoga, astrology, spirituality, and the occult. Their literary works, written primarily in Old Tamil (often in poetic or cryptic verse called Bogar 7000 , Agastyar 1200 , etc.), form a crucial part of Tamil literature. These texts, traditionally passed down orally or in palm-leaf manuscripts, are now increasingly being digitized and made available as PDF files . siddhar books in tamil pdf