Thanks to swarna, Siva and Sri on this topic. The novels are not available online - had to remove them after they were published.
Swarna - you will be able to get them in any Palaniappa brothers stall. Recently they were on display at Thanjai book fair.
Rajakesari and cherar kottai were written as independent novels even though one is a precursor to the other. The treatment is also different. In cherer kottai I tried a more complex plot with more characters and a background that spans three generations.
Paisaasam is a different genre. it was the result of my desire to write a crime fiction in the historic setting. The whole story happens in a pandiyan village which survives even today.
Why dont you give some synopsis of these works - one after other - in English - so that non-tamil knowing members like Katherine can understand the story-base atleast.