“Paul Zak's The Little Book of Happiness delivers a roadmap for deeper joy and meaning, weaving together cutting-edge neuroscience and timeless principles. You will be carrying this in your pocket for years to come.”
— Dr. Arthur C. Brooks, Harvard professor and #1 New York Times bestselling author
“The Little Book of Happiness is a masterful synthesis of cutting-edge science and practical wisdom. This isn't just another guide to happiness—it's a tool kit for flourishing, backed by neuroscience and decades of research. With his characteristic warmth and clarity, Paul Zak unpacks the role of virtues in building deeper connections and a more fulfilling life. The technology that accompanies the book makes age-old practices actionable for today's world, empowering the cultivation of joy in ways that are both measurable and deeply personal.”
— Dr. Mike Rucker, author of The Fun Habit
“Paul's book offers many easy-to-adopt practices that help us experience happiness and grow our joy muscles. Change is hard, especially making lifestyle changes that stick, so it is wonderful that readers can use the SIX app to understand what experiences on any given day are actually increasing their feeling of happiness.”
— Andrew Cannon, founder of The Art and Science of Joy