Note: This work is in the public domain per U.S. law, as it was written prior to 1926. The version I read was published by Foreign Languages Press.
From the Publisher: Socialism: Utopian and Scientific is a short essay written by Frederick Engels summarizing the history of socialism and dialectics from its idealistic roots to its most recent formulations. In it, Engels describes how Marx’s analysis based on economy and class struggle elevated socialism to a scientific stage.