"Stop Potapov" is an exciting psychological thriller from a Ukrainian writer. This book tells the story of a successful psychiatrist who one day starts receiving letters from an unknown criminal who signs himself as Potapov. In each letter, Potapov sends the psychologist mysterious challenges and tasks, which gradually turn into a real survival game. The reader, together with the main character, will try to solve Potapov's riddles, will feel the tension and desperate underwater struggle against the tricks of manipulation and challenges, which the unknown face of the criminal puts in front of him. "Stop Potapov" is a book that will leave the reader in suspense, confuse his thoughts and open a new page in the world of psychological and mental games of understanding.