The novel “The Ninth of Thermidor,” created by the outstanding Russian writer and philosopher Mark Aldanov, is dedicated to the overthrow of the Jacobin dictatorship and the death of their leader Maximilian Robespierre. The author has found a logical explanation for the mystery of the dramatic and highly controversial events that occurred on the eve of the death of the French dictator. This novel is part of the “Thinker” tetralogy, covering a huge panorama of world history from the French Revolution and the reign of Paul I to the decline of the Napoleonic Empire.