The publication of the book by a Russian scientist, a specialist in the field of polygraph tests, presents unique material and summarizes the author’s many years of practical experience. It tells about the origin, development and formation of printing science from ancient times to the present day. A whole range of problems are considered - from the formation of tests and the practice of conducting polygraph examinations, analysis of their results, to methods of neutralizing opposition to polygraph examinations. There are many specific examples of the work of specialists in solving real crimes using a polygraph. The book is intended both for polygraph specialists and for a wide range of readers interested in the development and application of the “lie detector” in various areas of polygraph technology.