Mani Ratnam's films Ponniyin Selvan I and Ponniyin Selvan II are based on the 1955 novel Ponniyin Selvan by freedom fighter R. Krishnamurthy, who wrote under the pen name Kalki.
If you are a movie aficionado, you would have realised by now that, these days, Indian cinema is looking back at India's history, especially its epics, with a renewed interest.