Authored by Anita Anand, it was published by Simon & Schuster UK in April 2019 to coincide with the 100th anniversary of the Jallianwalla Bagh Massacre in Amritsar, India.

Anand then refers back to 13 April 1919, when Brigadier General Reginald Dyer's troops fired 1,650 rounds at an unarmed crowd in what came to be known as the Jallianwalla Bagh Massacre.

[4] Part One has nine chapters and includes details of both Sir Michael O'Dwyer's and Brigadier General Reginald Dyer's lives, before giving the background and account of the Jallianwala Bagh Massacre.

[4][9] Sixteen chapters in Part Two complete the life of Udham Singh, tracing it from his childhood in Punjab to his travels through Germany, Russia, Mexico, California, and ultimately London in 1940, when he reached O'Dwyer and shot him "through the heart at point-blank range".

[12] Rakhshanda Jalil, in an article in India Today magazine, described the book as a "giant jigsaw", with a collection of myths and truths relating to Udham Singh's life.

[15] Saudamini Jain, writing for Hindustan Times, noted that Anand had sought evidence from top secret British government documents and used an assortment of characters when piecing together the story of Udham Singh.