About the book: 1949 / An atomic war began on Earth, and all the colonists were recalled from Mars, only one person remained - Barton. Trying to break his loneliness, he begins to record his voice and populates Mars with thousands of Bartons, he records all the possible answers to his questions. At some point he stops and programs tape recorders and telephones so that the next bell will ring when he is eighty years old...