This book presents the main economic argument developed by Marx in the three volumes of Capital in a coherent and comprehensive manner. It also delves into three long-standing debates in Marxist political economy: the transformation problem, the Okishio theorem, and theories of exploitation and oppression. Starting with discussions of methodology, including dialectics and historical materialism, the book explains key concepts of Marxist political economy: commodity, value, money, capital, reserve army of labour, accumulation of capital, circuit of capital, reproduction schemas, prices of production, profit, interest and rent. Scholars of economics, sociology, geography, political science, anthropology, and other kindred disciplines, will find here an accessible yet rigorous treatment of Marxist political economy.