"From the #1 New York Times bestselling author of Small Great Things and The Book of Two Ways comes a deeply moving novel about the resilience of the human spirit in a moment of crisis. Diana O'Toole is perfectly on track. She will be married by thirty, done having kids by thirty-five, and move out to the New York City suburbs, all while climbing the professional ladder in the cutthroat art auction world. She's an associate specialist at Sotheby's...

"After ten years away to build a family, Mallory returns to Floreana Island in the Galápagos, and to Gavin, the mentor with whom she had a long-ago affair. Their project is to build nests to revive the vulnerable penguin population. But Mallory doesn't dare tell Gavin why she's really come back. Then she discovers old journals hidden in a lava cave -- confessions of another woman who needed to disappear."--