RAAT, RAHASYA O PRADWITIYO is actually the sequel of the renowned detective novel PRADWITIYO authored by Tanmoy Chatterjee. 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. This best-selling detective novel is published by Deepti Prakashan and one of the finest creations of Tanmoy Chatterjee yet.