Recommended Textbooks for UPSC Economics Optional Subject:

1. Microeconomics

- Microeconomics by Pindyck and Rubinfeld: This book is highly recommended for understanding the basic concepts of microeconomics. It covers a wide range of topics including demand and supply, consumer theory, production and costs, market structures, and welfare economics.

- Intermediate Microeconomics: A Modern Approach by Hal R. Varian: This book provides a comprehensive analysis of microeconomic theory. It includes advanced topics such as game theory, market failures, and information economics.

2. Macroeconomics

- Macroeconomics by Mankiw: This book is widely used for studying macroeconomics. It covers topics like national income accounting, money and banking, inflation, unemployment, fiscal and monetary policy, and international trade.

- Macroeconomics by Dornbusch and Fischer: This book provides a detailed understanding of macroeconomic theory and policy. It covers topics such as economic growth, business cycles, and open economy macroeconomics.

3. Development Economics

- Development Economics by Debraj Ray: This book is recommended for studying development economics. It covers topics like poverty, inequality, education, health, and governance. It also includes case studies and empirical evidence.

- Economic Development by Todaro and Smith: This book provides a comprehensive analysis of development economics. It covers topics such as theories of economic development, rural and urban development, and the role of international trade and finance.

4. International Economics

- International Economics by Paul Krugman and Maurice Obstfeld: This book is widely used for studying international economics. It covers topics like international trade, international finance, and the impact of globalization on economies.

- International Economics by Dominick Salvatore: This book provides a comprehensive analysis of international economics. It covers topics such as trade policies, balance of payments, exchange rates, and regional integration.

5. Indian Economy

- Indian Economy by Ramesh Singh: This book is recommended for studying the Indian economy. It covers topics such as economic planning, agriculture, industry, services, and the role of the government in the economy.

- Indian Economy by Uma Kapila: This book provides a comprehensive analysis of the Indian economy. It covers topics such as economic reforms, fiscal policy, monetary policy, and the banking sector.

These textbooks are highly recommended for UPSC Economics Optional Subject as they cover a wide range of topics and provide in-depth understanding of the subject. It is important to supplement these textbooks with additional reading materials, current affairs magazines, and previous years' question papers to enhance your preparation for the UPSC examination.