Suzanna’s Surrender by Nora Roberts

A legend and a mystery, the Calhoun Emeralds vanished from the Towers, a mansion on the shores of Maine, long ago. Suzanna Calhoun has taken it upon herself to find them—only to discover Holt Bradford along the way. The last time they crossed paths was in high school. Now she’s a single mother protecting her family and he’s an exhausted ex-cop who’s turned his back on the world. But Holt is also the link to the Calhouns’ missing fortune—and when he agrees to help her, Suzanna realizes something even deeper and more passionate draws them together.