 After 1984 he began writing about the Armenian Genocide, and he subsequently also focused his attention on Kurdish issues and the PKK guerrilla organization, which resulted in his book published under the title "Die Kurden" in 1995.He was one of the first authors and commentators to investigate this topic in a contemporary context.He also wrote about the history of the Habsburgs (""Kaiser Karl"", ""Kaiserin Zita"").