 Then personal secretary to Pyarelal, Dewan Vasdev Khanna (1923–2010), played a key role with Richard Attenborough in completing a script for film "Gandhi", which attained world fame.Pyarelal continued his literary work on Gandhi until his last days.He has biographical books on Mahatma Gandhi, on which he was assisted by Dewan Vasdev Khanna(1923-2010).