"Counterpart" is an exciting science fiction novel written by the author for well-known fans of the genre. The book tells the story of two parallel worlds that exist side by side, but never intersect. The main character, who accidentally opened a portal between them, finds himself in the center of mysterious events and danger. The author describes in detail the life of both worlds, their unique rules and individual characteristics. The reader has the opportunity to plunge into exciting adventures, where every step can determine the fate of the heroes and the future of both worlds. "Counterpart" is not only an exciting fantasy, but also a deep philosophical essay about the diversity and possibilities of human existence. This book will fascinate the reader with its intense plot line, incredible images and unexpected turns of events.