A forgotten book. A deadly secret. A race against time.

Antiques dealer Anne Devereux never expected a simple estate sale in Fairfax, Virginia, to turn her world upside down. But tucked inside the pages of an old book lies a hidden WWII-era code—one that reveals the blueprint for a powerful secret society on the verge of unleashing global upheaval.

With her loyal (and unexpectedly heroic) cat Midnight and her steadfast partner Tom at her side, Anne is thrust into a dangerous mystery that quickly escalates. A break-in at her shop. A suspicious death. A home invasion. Each clue draws her deeper into a web of conspiracy that stretches back decades—and points to a man in upstate New York with plans that could change the world forever.

As a team of seasoned wartime codebreakers joins the fight, Anne must unravel the truth before history’s darkest secrets spark a new era of chaos.