The Kaiser's Holocaust: Germany's Forgotten Genocide and the Colonial Roots of Nazism, by David Olusoga and Casper W. Erichsen, is the unknown story of the genocide of the Herero and Nama peoples in Germany's forgotten African Empire - an atrocity that foreshadowed the Nazi genocides forty years later.

On 12 May 1883, the German flag was raised on the coast of South-West Africa, modern Namibia - the beginnings of Germany's African Empire. As colonial forces moved in , their ruthless punitive raids became an open war of extermination. Thousands of the indigenous people were killed or driven out into the desert to die. By 1905, the survivors were interned in concentration camps, and systematically starved and worked to death.

Years later, the people and ideas that drove the ethnic cleansing of German South West Africa would influence the formation of the Nazi party. The Kaiser's Holocaust uncovers extraordinary links between the two regimes: their ideologies, personnel, even symbols and uniform.

The Herero and Nama genocide was deliberately concealed for almost a century. Today, as the graves of the victims are uncovered, its re-emergence challenges the belief that Nazism was an aberration in European history. The Kaiser's Holocaust passionately narrates this harrowing story and explores one of the defining episodes of the twentieth century from a new angle. Moving, powerful and unforgettable, it is a story that needs to be told.