“Mysticism,” you will say after reading Victoria Danilova’s novel “Sister.” Yes, this intriguing story about the fate of two sisters can easily be classified as mystical. But after reading it to the end, you begin to believe in the reality of the events described. Who among us has not experienced love, betrayal, or deception at least once in our lives? Who among us has not thought about revenge as a just retribution? If we haven’t seen something, haven’t encountered something in this life, it doesn’t mean that it doesn’t exist, right?