The book Emancipation of Slaves in the United States by Rafael M. de Labra is a study of the complex process of emancipating slaves in the United States. The author examines the historical events marked by the Emancipation Proclamation and their consequences for the country's society and politics. The book explores the causes of slavery in America, the struggle for its abolition, and the consequences of emancipation for former slaves and American society as a whole. This work invites the reader on a fascinating journey into the past, helping to better understand an important chapter in the history of the United States.