"Historical Diary of the Guarani Rebellion and War, Who Lived on the Eastern Coast of the Uruguay River, in 1754" by Tadeas Xavier Genis, is an important and detailed account of a well-known event in the history of the South American continent. In his reporting diary, the author describes in detail the causes and progress of the Guarani rebellion against the Spanish colonial authorities, revealing the social, economic and political circumstances of the conflict. Thanks to this book, the reader will be able to better understand the internal contradictions and struggle for freedom and independence of the Indian tribes of that time."