"I found these characters so interesting that I knew I wanted to spend a very long time with them. I knew that three years, four years would not be enough. One book would not be enough," 58-year-old Ghosh said at the Kolkata Literary Meet last evening.
After the 'Sea of Poppies' (2008) and 'River of Smoke' (2011), the third part of the Iblis trilogy 'Flood of Fire' would be released later this year in May.
The writer, known for his historical fictions, said that one of the worst things about being a novelist is that when you finish a book you have to take leave of your characters, some of them even die.
"And thats actually an incredibly wrenching thing when you have been living with these people who in your head are completely real, as real as your friends and then suddenly the day comes when the book is out of your hands and you just have to say goodbye to them. Thats completely wrenching," Ghosh said.
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When he started writing, he had ideas for a character, few visual images and ideas of who they are and what they look like.
"But those are just smatterings, you build upon that," he said adding that he added little threads and sub-plots which could be utilised later on.
'Flood of Fire' is based on the first opium war between China and Britain.