About the book: year / On a recently discovered planet, two researchers were searching for artifacts of a civilization that had disappeared for unknown reasons. Having climbed into the mountains, on one of the plateaus they discovered a superbly preserved palace, in which almost nothing had been preserved. But in the center of the structure there was a room with a single relic - a book, after deciphering which the researchers were able to understand not only the reason for the disappearance of an entire people, but also found in it information regarding where they should build an observation station.