"The Master of the Irrational" is a fundamental book written by the famous American psychologist and economist Daniel Kahneman. In this book, the author examines the psychology of decision-making and the role of irrationality in our own thoughts and actions. Kahneman reveals how the human mind will often fail us in the process of making important decisions, even when we think we are rational. The author explains the concept of two systems of thinking - intuitive and rational - and guides the reader through important ideas and experiments that prove that our decisions are often based on emotions and subconscious biases. The Master of the Irrational helps us better understand the ways in which we make decisions and provides valuable insights to avoid common thinking errors. This book is a must for anyone interested in the psychology, economics, and philosophy of decision-making.