The banking crises in 2007-10 are not exceptional. There have been many such crises in the past in both developed countries and emerging economies. A banking crisis can be related to solvency or liquidity (or both). This book focuses on banking crisis and liquidity. This book starts from basics and gradually builds up with very few technicalities. Though the analysis is primarily theoretical, we provide a historical background, a macroeconomic perspective, and policy implications for both closed and open economies.