Before you is a book by the famous modern psychotherapist Andrei Ermoshin, which talks about the possibilities of diagnosing various patient conditions on the basis of a simple test “Constructive drawing of a person”. The drawing test helps the psychotherapist to quickly identify critical periods in the patient’s life that require careful psychotherapeutic study, provides in-depth capabilities for diagnosing health disorders. The practical application of the “Constructive drawing of a person” test in medical practice led the author of the book to the discovery of the relationship between graphic signs and the syndrome of oxygen (energy) starvation of the brain. The book “Geometry of experiences. Constructive drawing of a person in psychotherapeutic practice" is an invaluable guide for psychotherapists, psychologists, doctors, as well as for all those who want to help themselves and the people around them get rid of the burden of traumatic experiences.