The book "Terror on the Threshold" includes new documentary stories by A. Alexin, a classic of Russian literature, a laureate of international, as well as State Prizes of the USSR and Russia, awarded the highest awards of the USSR, and memoirs of T. Alexina, Honored Worker of Culture of Russia. This is a burning response to the ugly phenomenon of modern reality - terrorism, and one of its manifestations in Russia during the period of Stalinist repression.