Tess Gerritsen, the New York Times bestselling author of the Rizzoli & Isles series, now gives us a gripping stand-alone thriller.

In a shadowy antiques shop in Rome, Julia Ansdell happens upon a curious piece of music—the Incendio waltz—and is immediately entranced by its unusual composition. The mournful minor key and complex feverish arpeggios appear to dance with a strange life of their own. Back in Boston, when Julia plays the notes for the first time, the music has a terrifying and unexplainable effect on her young daughter, who seems violently transformed. Determined to track down the music score's origins, Julia travels to Venice—and uncovers a dark secret that not only dates back to the Second World War, but also directly involves a dangerously powerful family who will stop at nothing to keep Julia from bringing the truth to light.