This is a really excellent book. The author's goal is to present Marx's Capital as a political tool. The first chapter, or introduction, gives an overview of the political-economic and philosophical readings of Marx that have been dominant throughout Marxism. Cleaver argues that these readings do not give an adequate interpretation of Marx. Instead, they function to (unintentionally or intentionally) prop up capital. They do this by focusing on capital and asserting that capital has power. This is done through a critique of capital. Cleaver shows that instead, Capital should be read politically, as a tool to be used by the working class against capital. This, he argues, has precedent in the autonomist and situationalist movements in Italy and France during the 1960's, as well as in certain worker movements in the United States.
After this long introduction, Cleaver goes through a number of ways Capital can be read through this political lens. He goes through a methodological approach of looking at value and labour in Capital, and how these are tools used by capital in order to perpetuate the system. This includes further criticism of Marxist authors who make claims that there will be "work" or "money" in a post-capitalistic society.