After retiring from the military, Garder published various writings about the Soviet Union and communist regimes. He published a biography of Mao Zedong, a book about the German-Soviet War, another about the East German Army and, 1965, "L'Agonie du Régime en Russie Soviétique" ("The Death Struggle of the Regime in Soviet Russia") In the latter book, Garder stated that the death agony of the Soviet union was evident in "the conflict between a decaying regime that no longer has any justification other than the personal interests of those who profit by it" and "the upper strata of the technological intelligentsia."