The term "Black Swan" book likely refers to the book titled "The Black Swan: The Impact of the Highly Improbable" written by Nassim Nicholas Taleb. Published in 2007, this book explores the concept of Black Swan events, which are rare, unexpected, and highly influential occurrences that have profound consequences. 

In the book, Taleb discusses how people tend to underestimate the significance of rare events and are often unprepared for their impact. He also explores the limitations of prediction and traditional statistical methods in understanding and dealing with such events. Taleb uses various historical and contemporary examples to illustrate his points, and he provides insights into how individuals and societies can better navigate the unpredictable nature of the world.

The title "Black Swan" is a metaphor inspired by the belief that all swans were white until the discovery of black swans in Australia, challenging the previously held assumption. Similarly, the book encourages readers to challenge their assumptions and recognize the potential for rare and unexpected events to reshape our lives and societies.

"The Black Swan" has been widely praised for its thought-provoking ideas and its impact on the fields of economics, finance, and risk management. It has become a popular book for anyone interested in understanding uncertainty, randomness, and the role of unpredictability in our lives.