AMAZON.COM's 2015 BEST BOOK OF THE YEAR, NEW YORK TIMES BESTSELLER, A FINALIST FOR THE 2015 NATIONAL BOOK AWARD, SHORTLISTED FOR THE 2015 NATIONAL BOOK CRITICS CIRCLE AWARD. Every story has two sides. Every relationship has two perspectives. And sometimes, it turns out, the key to a great marriage is not its truths but its secrets. At age twenty-two, Lotto and Mathilde are tall, glamorous, madly in love and destined for greatness. A decade later, their marriage is still the envy of their friends, but behind closed doors things are even more complicated and remarkable than they have seemed.