The instant New York Times bestseller 'An indispensable guide' James Clear, author of Atomic Habits 'A game-changer' Morgan Housel, author of The Psychology of Money 'A must-read' Mark Manson, author of The Subtle Art of Not Giving a F*ck 'A masterwork' Ryan Holiday, author of The Daily Stoic We all want to see the world clearly. The trouble is, we're never taught how. Join Shane Parrish - 'the former spy who helps Wall Street mavens think smarter' (New York Times) - for a masterclass in the art of clear thinking. Drawing on examples ranging from the evolutionary origins of our 'emotion default' to the secret history of the Challenger disaster, Parrish offers powerful mental models to make sense of any situation. And he reveals a simple, actionable method for smarter decision-making, starting today. Along the way, he shows that the secret to mental clarity lies not in how we approach the most high-stakes moments - but in our tiniest, most everyday decisions. It's a simple idea with startling implications: if you clear your head today, you change your life tomorrow. _ 'Incisive. Practical. Full of vivid examples, and enormously fun to read.' Jim Collins, author of Good to Great 'Shane Parrish doesn't just teach clear thinking - he lives it.' Adam Grant, author of Originals 'If you want results - good ones - that you can achieve confidently again and again, read this book.' Annie Duke, author of Quit