Anza O'Malley is in most ways a typical single mom. She lives a happy, busy life with her five-year-old son in Cambridge, Massachusetts, juggling the joys and challenges of life as a doting parent and a freelance bookbinder. But there is more to Anza than meets the "ungifted" eye: she can see and speak with ghosts.

Although she's been solving cold cases for the police for years, Anza has been hoping to focus her energies on her son and her bookbinding career. But when an exquisite and priceless illuminated manuscript is stolen from the Boston Athenaeum, and when its desecration spurs the appearance of some very unhappy spirits, Anza can neither look nor walk away. With an unlikely trio of ghosts by her side-a charming butler and two medieval monks-Anza leads us on an urgent journey through Boston's winding, cobbled streets to uncover a trail of deceit, danger, and ghoulish intrigue.