Kolkata, June 9 -- The West Bengal government moved court against Bharatiya Janata Party (BJP) leader Koustav Bagchi alleging that he has "repeatedly made derogatory comments and defamatory statements against chief minister Mamata Banerjee", officials aware of the matter said on Sunday. Bagchi, however, argued that whatever he mentioned were contents from a book written by retired IAS officer and former TMC legislator Dipak Ghosh who died in March this year. "The book is not banned. I mentioned some of its contents. I will prove in court that the charges hold no water," Bagchi told HT. In an order passed on June 5, Calcutta city sessions court chief judge Sukumar Ray said Bagchi, also a Calcutta high court lawyer, will be heard on June 18....