"On the Eternal Threshold" is an exciting science fiction book written by one of the most famous Ukrainian writers. In this work, readers will immerse themselves in a world where humanity has colonized deep space and faces incredible challenges and threats. The main character, an ambitious researcher, sets out on a dangerous mission to the Eternal Threshold - the mysterious border of known space. There he will face the secrets of the past, the dangers of the future and his own fears. The book is full of tension, unexpected turns of events and philosophical considerations that make the reader think about the place of man in the boundless universe. "On the Eternal Threshold" is a crazy journey into the unknown, where every step can decide the future of civilization.