"The Black Swan" is a book by Nassim Nicholas Taleb that explores the impact of rare and unpredictable events, known as Black Swan events. These events have significant consequences and are often rationalized in hindsight, making them seem less random than they are. Taleb argues that traditional methods of forecasting and risk assessment fail to account for these unpredictable occurrences. He emphasizes the importance of being aware of our limitations in understanding the world and encourages readers to embrace uncertainty rather than avoid it.