In her work, Gretchen Rubin draws from cutting-edge science, the wisdom of the ages, lessons from popular culture, and her own experiences to explore how we can make our lives happier, healthier, more productive, and more creative. She is the author of many books, including the blockbuster New York Times bestsellers Outer Order, Inner Calm, The Four Tendencies, Better Than Before and The Happiness Project.Her books have sold over 3.5 million copies worldwide, in more than thirty languages. The Happiness Project spent two years on the bestseller list. On her top-ranking, award-winning podcast Happier with Gretchen Rubin, she discusses happiness and good habits with her sister Elizabeth Craft. She is a regular columnist for O, The Oprah Magazine and makes regular appearances on CBS This Morning.