Marriage brokerage, Suicide victims, Mate selection, Suicide pacts 

The Thorpes were the perfect couple: young, attractive, and ideally matched. But the veil of perfection can mask many secrets. When the Thorpes are found dead in their tasteful Flagstaff living room—having committed double-suicide—alarms go off in the executive offices of Eden, Incorporated, the worldwide matchmaking phenomenon that uses its astonishing artificial intelligence to create supercouples and guarantee its customers just one thing: lifelong happiness.

Enter Christopher Lash, a gifted former FBI forensic psychologist who is brought in by Eden to perform a quick—and quiet—investigation. As Lash conducts his detailed “psychological autopsy,” he delves deep into the seemingly ordinary private lives of the Thorpes, all the while trying to suppress a personal tragedy of his own that has been kept buried in the past. But when another perfectly matched couple commits double-suicide, Lash finds himself suddenly pulled in to the many hidden layers of Eden, Incorporated. It is an astonishing world—one inhabited by Eden's genius, reclusive founder, Richard Silver—a world that inadvertently may bring Lash face-to-face with his own demons.