The Patient Assassin, A True Tale of Massacre, Revenge and the Raj (2019) is a book based on the life of Indian revolutionary Udham Singh, authored by Anita Anand and published by Simon and Schuster (Scribner) in April 2019, to coincide with the one hundredth year anniversary of the Jallianwalla Bagh Massacre, in Amritsar, India.