 A collection of essays on Wilhelm II and aspects of governance in Imperial Germany then followed entitled "Kaiser, Hof und Staat" (1987) and "The Kaiser and his Court" (1994) respectively.In 1981, Röhl began further archival research for what was to become a three-volume biography of Kaiser Wilhelm II, published in German by the C. H. Beck Verlag in Munich between 1993 and 2008, and in English translation by Cambridge University Press between 1998 and 2014.The biography, which was awarded the Einhard Prize for European Biography in 2013, is considered an important contribution to the ongoing controversy on the origins of the First World War.