"Agat 5" is a science fiction novel by the Ukrainian writer Oleksiy Kadansky, which tells about events in the distant future, where humanity has undergone radical changes. The main character, a cyborg named Agate 5, decides to travel through time to change the inevitable end of the world. This book not only captivates the reader with an exciting plot, but also makes you think about the concepts of human nature, the future world, and the possibilities of technology. "Agate 5" is an exciting and driving adventure that will leave you surprised and inspired to new thoughts about the future.