Trilokeshwar Shonku (Bengali: প্রফেসর শঙ্কু) is a fictional scientist and inventor created by Satyajit Ray in a series of Bengali science fiction books of the same name published from 1965 on. He is the central protagonist of the series. Professor Shonku resides in Giridih. His house contains a laboratory, and he lives with his pet cat, Newton, named after Sir Isaac Newton and his man-servant, Prahlad. He was born in the year of 1912 but his year of death is unknown.
Topic: Ghost, Human soul
Plot: Professor Shonku invents a device named Neo-Spectroscope that can contact souls of deceased people and starts researching with it. At the same time some people, including Abinash Majumdar, starts reporting Professor Shonku that they have seen him in some places of Giridih and when they called him, he paid no attention. Now, Professor Shonku clearly knows that he was not the person. At the end of the story, Batukeshwar Shonku, grandfather of great grandfather (oti briddho propitamoho) of Shonku appears.
Location: Giridih
Source: Wikipedia