Question: What is the name of the writer who wrote a novel about a Berlin conference held on 20 January 1942?

The Anglo-Portuguese Treaty of 1891 was an agreement between the United Kingdom of Great Britain and Ireland and Portugal which fixed the boundaries between the British Central Africa Protectorate, (now Malawi), and the territories administered by the British South Africa Company in Mashonaland and Matabeleland, (now parts of Zimbabwe), and North-Western Rhodesia (now part of Zambia) and Portuguese Mozambique and also between the British South Africa Company administered territories of North-Eastern Rhodesia (now in Zambia), and Portuguese Angola.  This treaty brought to an end over 20 years of increasing disagreement over conflicting territorial claims in the eastern part of Central Africa, where Portugal has long-standing claims based on prior discovery and exploration but where British citizens set up missions and embryonic trading concerns in the Shire Highlands in what is now Malawi from the 1860s.  These disagreements were increased in the 1870s and 1880s, firstly by a dispute over a British claim to part of Delagoa Bay and by the failure of bi-lateral negotiations between the two countries over the boundaries of Portuguese territories and secondly as a result of the Berlin Conference of 1884–85, which set-out the doctrine of effective occupation.  After the Berlin Conference, Portugal tried to establish a zone of effective occupation linking its colonies in Angola and Mozambique through expeditions making treaties that would establish protectorates over local peoples and obtaining recognition from other European powers.  The relative success of these Portuguese efforts alarmed the British government of Lord Salisbury, which was also under pressure from missionaries in the Shire Highlands, and also Cecil Rhodes, who founded the British South Africa Company in 1888 with the aim of controlling as much of south-central Africa as it could.  For these reasons, and in response to a minor armed conflict in the Shire Highlands, Lord Salisbury issued the 1890 British Ultimatum which required Portugal to evacuate the areas in dispute.  Lord Salisbury refused the Portuguese request for arbitration and, after an abortive attempt to fix the boundaries of their respective territories in 1890, the Anglo-Portuguese Treaty of 1891 was accepted by Portugal under duress. <SEP> Fatherland is a 1992 alternate history detective novel by English writer and journalist Robert Harris.  Set in a universe where Nazi Germany won World War II, the story's lead protagonist is an SS officer investigating the murder of a Nazi government official who was one of the participants at the Wannsee Conference.  In so doing, he discovers a plot to eliminate all attendees of the conference in order to help Germany establish better political relations with the United States. <SEP> The Wannsee Conference (German: "Wannseekonferenz" ) was a meeting of senior government officials of Nazi Germany and "Schutzstaffel" (SS) leaders, held in the Berlin suburb of Wannsee on 20 January 1942.  The purpose of the conference, called by the director of the Reich Main Security Office SS-"Obergruppenführer" Reinhard Heydrich, was to ensure the cooperation of administrative leaders of various government departments in the implementation of the so-called Final solution to the Jewish question, whereby most of the Jews of German-occupied Europe would be deported to Poland and murdered.  Conference attendees included representatives from several government ministries, including state secretaries from the Foreign Office, the justice, interior, and state ministries, and representatives from the SS.  In the course of the meeting, Heydrich outlined how European Jews would be rounded up and sent to extermination camps in the General Government (the occupied part of Poland), where they would be killed. <SEP> The Congo Arab war (also known as the Congolese-Arab war and the Belgo-Arab War) took place in what is now the Democratic Republic of the Congo between the forces of Belgian King Leopold II's Congo Free State and various Zanzibari "Arab" slave traders led by Sefu bin Hamid, the son of Tippu Tip.  Fighting occurred in the eastern Congo between 1892 and 1894.  It was a proxy war, with most of the fighting being done by native Congolese, who aligned themselves with either side and sometimes switched sides.  The causes of the war were mainly economic, since Leopold and the Arabs were contending to gain control of the wealth of the Congo.  The war ended in January 1894 with a victory of Leopold's forces.  Initially King Leopold II collaborated with the Arabs but competition over the control of ivory and Leopold II's humanitarian pledges to the Berlin Conference to end slavery, turned his stance to confrontational.  The war against the Swahili-Arab economic and political power was presented as a Christian anti-slavery crusade.