During the first decade of the twenty-first century he came to prominence beyond the confines of the German academic community with compilations, books, articles and interviews concerned with Adolf Hitler.
Eberle himself insisted that it could not be classified as a satisfactory biography because it had not been possible to access Soviet archives from the 1950s and 1960s, a period crucial in Honecker's rise to power, and one during which within the party politburo Central Committee he had apparently been promoting plans for the invasion of West Germany.
The Soviet compilers had been able to access large amounts of documentary material obtained when the Soviets had captured Berlin (including the Reich Chancellery and the bunker in which Hitler had killed himself), and from the extensive interrogations of the Nazi leader's valet Heinz Linge and personal adjutant Otto Günsche.
[11] For 2009 Henrik Eberle joined up with the physician and writer Hans-Joachim Neumann [de] and together they produced a book entitled War Hitler krank?
[12] The book lists 82 different medications that Hitler used while he was in charge of Germany, and debunks various popular myths along the way, while also concluding that towards the end of his life he began to suffer from Parkinson's disease.