A missing child tears a family apart in this switchback roller coaster of a psychological thriller that builds to a final, jaw-dropping twist, perfect for fans of Jennifer Hillier and Lisa Lutz.

On the surface, Sonia and Graham Starr were a glamorous couple: She, the sleek entrepreneur; he, the boyishly handsome painter with an irrepressible zest for life. They had everything money can buy and the one thing it can’t—a precious, precocious four-year-old named Roxie. But when Roxie disappears into the Pacific Ocean on a perfect August afternoon, their world crumbles around them.

Months later, Roxie’s twenty-one-year-old former nanny, plagued by guilt and confusion, returns to the Starrs’ beach house on the “American Riviera,” the rarefied stretch of land around Santa Barbara where the mountains meet the sea. Her first night back, she gazes out at the sand, only to see a child who bears a striking resemblance to Roxie. When she calls out, the child runs away.

Colleen never believed that Roxie, who was afraid of the surf, would run into the ocean on her own. Now, she is determined to get to the truth, even if it means facing her greatest fears.

The Girl on the Beach asks us who we trust when we can’t trust ourselves.