Nobel Laureate (Economic Sciences, 2002) Daniel Kahneman’s latest offering Thinking, Fast & Slow (Farrar, Straus and Giroux, USA) is a magnum opus, giving us a superb compendium and forward-looking discussion of his award winning work conducted often with his longtime collaborator Amos Tversky. Kahneman’s work created significant ripples in decision making and behavioral economics, rendering contentious one of the fundamental assumptions of modern economic theory, namely, the rational agent paradigm. In this review, we discuss the key elements of the book, while also brining into perspective the main findings of the works presented therein.