Chetan Bhagat will release his new novel titled ‘400 Days’ on 08, October 2021. He has released the cover for the same. Bringing back Keshav Rajpurohit from ‘The Girl in Room 105’ and ‘One Arranged Murder’, his upcoming book revolves around the story of a missing girl, love, friendship, the crazy world we live in and, Siya and her mother Alia’s determination to find the young girl even when everybody else in the family has given up.