About the book: 1986 / On the morning of May 14, 1610, on the Rue Ferronry in Paris, Henry IV, the king of France and Navarre, was killed with a dagger in the chest. But chrononaut Olsen, a professor at the Ecumenical University , claims that at noon of that day he talked with the living and healthy Henry of Navarre... Who shouted: “Beware, Navarre!” and changed history?