Gretchen Rubin is one of today's most influential observers of happiness and human nature. She's the author of many books, including New York Times bestsellers Outer Order, Inner Calm; The Four Tendencies; Better Than Before; and The Happiness Project. Her books have sold more than 3.5 million copies worldwide, in more than thirty languages. She hosts the top-ranking, award-winning podcast Happier with Gretchen Rubin, where she explores practical solutions for living a happier life. Raised in Kansas City, Rubin lives in New York City with her husband and two daughters.