Karnaphuli () is a novel written by Alauddin Al-Azad. It was published in 1962. the author portrays the lives of various unique communities living along the banks of the Karnaphuli River.
The protagonist of the story, Ismail, is essentially a rough, thug-like young man whose first occupation was pickpocketing. Impressed by his boldness, a contractor named Ramzan takes him along to the hilly region of Kaptai to assist in his work. It is there that Ismail falls in love with Rangamila, the daughter of Lal Chacha. However, due to various circumstances, he suppresses his feelings and returns home. Back home, he marries Juli and tries to settle down. But his heart never truly finds peace in domestic life. The childhood dream of becoming a shipâÂÂs captainâÂÂsarengâÂÂkeeps haunting him day after day. The waves and currents of the Karnaphuli River seem to call out to him even in his dreams. And one day, the opportunity arrives. Despite the strong objections of his mother and wife, he eventually sets sail on the waters of the Karnaphuli as the sareng of a ship.