Friendship takes center stage in New York Times bestselling author Nancy Thayer’s captivating, emotionally charged novel featuring all the tenderness and wit, drama and romance that readers have come to expect from this insightful, much-loved writer.

When they meet as girls on a beach in Nantucket, Maggie Drew and Emma Hudson become fast friends—though Emma’s well-heeled mother would prefer that she associate with the upscale daughters of bankers and statesmen rather than the child of a local seamstress. But the two lively, imaginative girls nevertheless spend many golden summers together building castles in the sand, creating magical worlds of their own, and forging grand plans for their future.

Even as Emma falls for Maggie’s brother, Ben, and the young women’s paths diverge, the duo remain close friends. Then the unthinkable happens: a lifelong friendship is pushed to its breaking point with the appearance of the handsome, charismatic, charming, and incredibly sexy Wall Street trader Cameron Chadwick—upending both of their lives.

Struggling with the difficult choices they have made and the secrets they have kept, Maggie and Emma find the road to love and fulfillment is full of bumps and twists, as well as entirely unexpected and quite wonderful turns of the heart. They also learn that while true love may be rare, a true friendship is rarer still.