"The Five-Day Tube" is a science fiction work by the famous American writer Murray Leinster. The book tells about an inventor who invents a device that opens the gate to the fifth, previously unknown, reality. During the exploration of the fifth section of space, he will encounter dangers, mysterious creatures and incredible discoveries. Traveling through the fifth interspace, the hero finds himself in the middle of a battle between the forces of light and darkness, where every step can be fatal. "Five-day Tube" fascinatingly reveals the topic of human interaction with the secrets of the universe and presents the reader with numerous riddles and unexpected plot twists.