'RAAT, RAHASYA O PRADWITIYO' is actually the sequel of the previous well-known edition named 'PRADWITIYO' by the same author. The famous detective Mr. Pradwitiyo Roy Chowdhury and his friend Dr. Abhirup Mukherjee again seem to be involved in a deep, dense, critical and deadly mystery in this novel. The story is all about the unique detecting technique of Mr. Roy Chowdhury and his unbelievable expertise in criminology.