It was published in the United States by Simon & Schuster in 2017 as A Flag Worth Dying For: The Power and Politics of National Symbols.

Marshall, a journalist who has worked in 25 countries over 40 years for the BBC and Sky News among others, writes in the book about flags and their role in history and identity.

[1][2][3] A review by Lawrence Joffe in The Jewish Chronicle praised Marshall for using his experience as an international journalist to animate a subject that "at first glance, [...] might seem dry".

[2] Writing for The Washington Post, Moisés Naím found the book timely for what he considered to be an age of heightened nationalism.

[3] In USA Today, Ray Locker concluded that the book was "fresh explanation of symbols we often take for granted, and a keen meditation on what flags mean to those who embrace or recoil from them".