I meet author Amitav Ghosh, 67, for a delicious lunch opposite the picturesque Bandstand Promenade in Bandra just a day after the Mumbai launch of his new book Smoke and Ashes at the Royal Opera House on July 18. Published by HarperCollins India, it is a work of non-fiction that traces the economic and cultural history of the opium trade, focusing on “the transformative effect” it had on Great Britain, India and China. The research for this book took him to Guangzhou and Mauritius, and also made him confront how the history of his own family intertwined with the journey