A new book by Andrei Levkin, author of “The Interregnum”, “The Gypsy Novel”, “Black Air”, “Brains”, “Schastielovka”, “Marpla”. The author again creates a private genre, for use in a single case: this is a book about Vienna and it can even be used as a guide - subjective, but not for tourist areas. Of course, Vienna is also made up of those who created this great urban culture, and this is how the hero gets into the adventure. Feeling that he has begun to interact with the city and its people, he tries to understand how and why this is happening. He finds himself in the game - as if some operating system is entering him, gradually turning him into something new. Wien OS forces him to move from level to level, requiring him to complete the game completely, but what will happen then cannot be predicted.