In his best known work, "Crime Without Punishment" (November 1952), Reinhardt recounts several cases related to Soviet espionage in the United States, including the death of Juliet Stuart Poyntz (for whom his major source was Ludwig Lore), Arkadi Maslow, Leon Trotsky, Otto Ruhle, Horst Berensprung, Ellen Knauff, and Karl Nierendorf.