From New York Times–bestselling authors Dr. John Gottman and Dr. Julie Schwartz Gottman, a simple yet powerful plan to transform your relationship in seven days. What makes love last? Why does one couple stay together forever, while another falls apart? And most importantly, is there a scientific formula for love? Drs. John Gottman and Julie Schwartz Gottman are the world’s leading relationship scientists. For the past forty years, they have been studying love. They’ve gathered data on over three thousand couples, looking at everything from their body language to the way they converse to their stress hormone levels. Their goal: to identify the building blocks of love.