The instant Sunday Times bestseller, Sea of Tranquility by Emily St. John Mandel investigates the idea of parallel worlds and possibilities, and plays with the very line along which time should run. 'So wise, so graceful, so rich' - Naomi Alderman, author of The Power'Ingenious' - Guardian Lives separated by time and space have collided, and an exiled Englishman, a writer trapped far from home, and a girl destined to die too young, have each glimpsed a world that is not their own. Travelling through the centuries, between colonies on the moon and an ever-changing Earth, together their lives will solve a mystery that will make you question everything you thought you knew to be true. From the award-winning author of Station Eleven.