The book has been classified in three main Parts (1) Basic Theory of Economics which consists of definition and explanation of basic terms and concepts of economics, Market Mechanism of Adam Smith, Basic elements of demand and supply, elasticity of Demand & Supply, Classification of Competitive markets, International trade & International markets, Labour Productivity, Business Cycles of Kenyes theory etc. which consists about 70 pages. (2) Economy of various countries (12 in number) which are developed, developing and under developed countries and critical observations on the present status of these economy which consists of about 300 pages. (3) External & Public debt of various countries and critical observations on this issue. I hope that the book will be useful for economic students and you as the general readers will also find it worth reading.