The book "Portugal-Brazil Relations: Immigration and the "Denationalization" of Brazil" by José Barbosa explores the complex history of relations between Portugal and Brazil, particularly against the background of the processes of immigration and the "denationalization" of Brazilian society. The author examines the historical events that were crucial for the formation of relations between these two countries, paying attention to the cultural, social and political aspects of this process. The book is a valuable resource for understanding the interaction between Portugal and Brazil and the impact of immigration on the formation of Brazilian national identity.