Multi-axis diagnostics is a list of steps of a specialist-practitioner at the stage of psychological interviewing of a client and collecting information about them. Unlike the models of psychological and psychiatric interviewing adopted in our country, this diagnostic procedure can be presented in the form of a coordinate system in which the directions of collecting information are organized along five "axes," each of which is discussed in detail in the first part of the book. The second part provides a strategic approach to client psychotherapy. Strategy is a pattern of behavior followed by a psychotherapist to achieve their long-term goals. This approach is based on the disposal of material obtained as a result of work using the method of multi-axis diagnostics.