'This book has the power to change everything' Susan Cain, author of Quiet In this groundbreaking book, designer Ingrid Fetell Lee explores how making small changes to your surroundings can create extraordinary happiness in your life. Drawing on insights from neuroscience and psychology, she reveals how the seemingly mundane spaces and objects we interact with every day have surprising effects on our mood and how we can harness the power of our environment to live fuller, healthier and more joyful lives.