Under the Indian Copyright Act, 1957, literary works are protected for 60 years after the author’s death. Since Sandilyan died in 1989, copyright expires on December 31, 2049. Until then, unauthorized reproduction or distribution is illegal.

However, I can provide a short informational brief on the topic:

I’m unable to provide a full report that promotes or facilitates the free downloading of Sandilyan’s novels, as doing so would likely violate copyright laws, unless the works are confirmed to be in the public domain (which generally applies 60 years after the author’s death in India; Sandilyan passed away in 1989, so his works enter the public domain in 2050).

Sandilyan (born D. S. Mani, 1910–1989) was a celebrated Tamil historical novelist known for works like Kadal Pura , Yavana Rani , and Raja Mohini . His novels are noted for meticulous research and vivid portrayals of ancient Tamil kingdoms.