Who launched the book "The Emergency - Indian Democracy's Darkest Hour" on 24th of June 2017?

Venkaiah Naidu has launched the book which titled The Emergency - Indian Democracy's Darkest Hour on 24th of June 2017. A book is written by Surya Prakash who is a chairman of PrasharBharati. The book was launched at a conference to mark the anniversary of the Emergency and to honour all those who fought for restoration of democracy in the country in the mid-1970s.