In Nadezhda Nikitina's book there are four stories and a novella, which could be said to represent the adventure genre, if they did not contain significant elements of science fiction, philosophy and journalism. They can be compared with the American science fiction writer Bradbury, the Polish Stanislav Lem and the famous Russian authors the Strugatsky brothers. The development of the plot, the language, the characters of the characters - everything in this book reveals a mature master. But there is something even more important: the story “Habitat Zones” is an important and deep warning to us, contemporaries, clothed in the fantastic a story about the future. A teenager will read with enthusiasm, a young man - with attention, a mature reader - with thoughtfulness, an elderly person - with hope.