Secrets of the twentieth century. Incomprehensible and real. Einstein and the Unified Field Theory. Curved space with temporary transitions to another reality. The Philadelphia experiment, which the Pentagon has been strenuously denying for three quarters of a century. What is this? Coincidences or patterns? Scientific experiments or intelligence operations? The world has not yet been given the opportunity to know what really happened. “Troyan” is book 5 in the “Call Sign “Swallow”” series. Political detective. An attempt to find answers to some questions from the past. People. With their eternal problems of love and hate, jealousy and self-interest. With an ineradicable desire to come out of the shadows, get to the pinnacle of power, find and increase. The plot centers on the life and service of a married couple of Soviet illegal intelligence officers. Invisible front. One of whose combat missions is to search for a colleague with the agent pseudonym Troyan...