The book "An International Language, Past, Present and Future with Esperanto Samples and Grammar" by author Walter John Clark is a study of the development of international languages from ancient times to the present. The author explores ways of creating international communication systems and predicts their future. The book presents not only the theoretical aspects of the international language, but also specific samples of the Esperanto language, which allow the reader to better understand the principles of its construction and functioning. In addition, the book provides grammatical analyzes of Esperanto, which expand the understanding of the features of this international language. "International Language, Past, Present and Future with Esperanto Samples and Grammar" is an interesting resource for those interested in linguistics, international relations and languages in general. Analyzing various aspects of language, the author provides a unique perspective on the role of language in the modern world and the future prospects of its development.