The book is about the history of the Dinka people of the Sudan. The Dinka are a Nilotic ethnic group native to South Sudan. They are known for their tall stature, their cattle culture, and their warrior traditions. The Dinka have a long and complex history, marked by periods of both conflict and cooperation with neighboring groups. They have also faced significant challenges from the Sudanese government, including displacement and persecution. Despite these challenges, the Dinka have managed to preserve their culture and traditions.