The main character of the book is Fedya Sinyavsky, the son of Tsar Ivan IV, who was born in the 16th century and became a great inventor and scientist. He is a talented person who has a unique ability to see into the future and predict the development of science and technology. The book describes the life of Fedya Sinyavsky, his struggles and achievements, and how he uses his abilities to help humanity. The story takes place in the 16th century, during the reign of Tsar Ivan IV, and follows the life of Fedya Sinyavsky, the son of the tsar, as he grows up and becomes a brilliant inventor and scientist. The book explores themes such as the power of imagination, the importance of education, and the impact of technology on society. The book also delves into the political and social climate of the time, highlighting the tensions between Russia and Western Europe, and the challenges faced by Fedya as he tries to make a difference in the world. Throughout the novel, Fedya's unique abilities allow him to foresee the future of science and technology, and he uses this knowledge to create innovative solutions to the problems of his time.

''