"The Last Letter" is a fantastic novel written by the American writer Fritz Leiber. The book tells the story of a group of scientists who accidentally discovered a path to an alternate reality. The main characters find themselves in a trap, where time and space begin to change, violating the usual laws of physics. Will they be able to find a way out and return to their own world? This book fascinates the reader with its mystery, tense plot and unexpected ending. The Last Letter is a thrilling adventure read that will leave you wondering about the nature of reality and the possible paths of travel into the unknown.