The State Council of the Duchy of Warsaw has been the subject of numerous analyses by various authors, including W. Sobocinski, H. Izdebski, and W. Witkowski, whose publications became part of the achievement of Polish scholarship. Given the current state of research, the task of providing a comprehensive description of the institution and devoting a whole monograph to it was very difficult. Undoubtedly, the author of the book has managed to gather together and order the scattered information, which enables the reader to fully comprehend the nature and importance of the tasks set before the institution in question, but the book does not contain many new findings. It was based on a very thorough bibliographical research, and the author confirmed his position of an expert on the history and administration of the Duchy of Warsaw. It will certainly find many readers interested in the history of the Duchy of Warsaw, and the law and administration on the Polish lands in the nineteenth century. Also worth noting is the systematic presentation of the history of state councils in Napoleonic Europe which points out both similarities and differences in their organization, competences and functioning.