NATIONAL BESTSELLER "Engrossing. . studded with wisdom about long-held bonds. " "”People, Book of the Week "Enthralling, masterfully written. rich with social and psychological insights. " "”The New York Times Book Review "A magnificent storytelling feat. " "”The Boston Globe The "utterly engrossing, sweeping" (Time) story of a lifelong friendship between two very different "superbly depicted" (The Wall Street Journal) women with shared histories, divisive loyalties, hidden sorrows, and eighty years of summers on a pristine point of land on the coast of Maine, set across the arc of the 20th century.