New Delhi Sep 23 PTI Bestselling author Chetan Bhagat on Thursday released the trailer of his upcoming book 400 Days The book published by Westland is the third story from the Keshav-Saurabh series after The Girl in Room 105 and One Arranged Murder It will be released on October 8 The trailer though not cinematic like the previous instalments from the series featuring actor Vikrant Massey saw Bhagat narrating the plot himself about a missing girl Siya and her mother Alia Aroras determination to find the young girl and seeking help for the same from Keshav Rajpurohit I feel 400 Days is my best book ever maybe because I wrote it with full focus as we were all in a lockdown In 400 Days Ive tried to explore themes of a missing child dangers of the internet and infidelity Bhagat had said during the launch of the book cover on Tuesday According to the publishers revolving around a kidnapping and a forbidden love story 400 Days is a riveting read filled with mystery and romance unlike no other From Indias highest-selling author comes a page-turner that will not only keep you glued to the story but also touch you deeplyThe book presents an unputdownable tale of suspense human relationships love friendship the crazy world we live in and above all a mothers determination to never give up they said in a statement PTI MG TRS TRS