About the book: 1971 / A wonderful invention falls into the hands of people who, at a certain moment, make another doomed attempt to change the whole world. The invention makes it possible to observe the details of the personal life of the “powerful of this world,” find long-buried treasures, and learn any industrial secret; or make historical films, restore the texts of the Library of Alexandria, fight to ensure that there are no more wars in the world... And it is quite natural that it is by attempting to discover the truth about historical figures that the heroes incur the wrath of rulers and ordinary people.