Kalpurush is the third book of Samaresh Majumdar’s Animesh tetralogy, the long story that began with Uttaradhikar and Kalbela. By this point Animesh has lived through the Naxalite years and is trying to figure out what kind of life is possible afterward.
If you have read the earlier books you will want to read this one. The whole tetralogy is one of the great modern Bengali fictional achievements.