Book excerpt: This book is an attempt to explain to the layperson what contemporary economics is about. It starts on the assumption that most economics is just refined common sense and clearly explains the key ideas associated with each issue. All the main topics of academic economics are considered: the theory of individual choice, the labour market, the competition between firms, international trade, economic growth, the stock market, unemployment, and money. The general principles are sketched first without maths or diagrams, and then discussed in the context of topical problems such as the collapse of communism in Eastern Europe, the lack of development in the third-world countries, the contrast between market forces and the protection of the environment, showing how economics is not necessarily a dry academic pursuit.