The review of the monograph devoted to the modern concept of interpretation of international treaties, prepared by the author’s team under the editorship of Doctor of Law, Professor, Honored Scientist of the Russian Federation A. Ya. Kapustin, is presented. It is noted that this scientific work is a significant event in the world of legal science, makes a significant contribution to the Russian science of International Law due to the circumstances of the scientific substantiation of the phenomenon of interpretation of an international treaty, the systematic development of issues of theory and practice of the designated problem of the science of International Law.