About the book: 2023 / About a failed attempt to travel to other historical eras of the planet, when a group of geologists discovers a certain dungeon near the Uchur River leading to parallel worlds of others measurements. Meanwhile, in the countless layers of the stratosphere, the expedition members hear the virtual voices of one hundred and nine billion inhabitants of the Earth who have ever lived, died and inhabited the planet throughout the history of the existence of the first civilizations.