"The project to move the borders from Buenos Aires to Rio Negro and Colorado" is a unique book, the author of which is Sebastian Undiano y Gastelu. In this work, the researchers managed to make an in-depth analysis of the processes of border movement in the southwestern part of Argentina in the 19th century. The authors highlight important historical events that influenced the formation of the territory of this region, reveal the political, ethnic and socio-cultural aspects of this process. The book is a valuable resource for anyone interested in Argentine history and the study of territorial change. Analyzing the activities of the movement of borders from Buenos Aires to the Rio Negro and Colorado rivers, the authors reveal the complexity and importance of these processes for the formation of the modern picture of the geopolitical landscape of the region. Professionally written and thoroughly researched, this is a must-read for anyone interested in the history and political geography of South America."