Another theme could be survival. Maybe the story is set during a difficult time in Chennai, like a natural disaster or economic hardship, and it shows how people manage to get by day by day. There could also be a theme of cultural heritage. Chennai has a rich culture, and the story might revolve around the preservation or celebration of that heritage on a specific day.
I'm not really sure specifically which 'chennaiyil oru naal real story' you are referring to. There could be many stories related to a day in Chennai. It could be about a personal experience, a historical event that took place in Chennai on a particular day, or a cultural happening.
I'm sorry, I'm not familiar with the specific 'oru naal koothu full story'. You can try to search for it on some movie review websites or local cultural platforms.
I'm not sure where you can find this specific novel. You could try looking in local libraries, they often have a wide range of novels including some less - known ones.
I'm not familiar with the 'sukh mahi naal le gaya novel'. However, novels usually tell a story. It could be about love, adventure, or the daily life of the characters. Maybe it has unique characters and a captivating plot that are typical of a great novel.