When the National Security Agency's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls in its head cryptographer, Susan Fletcher, a brilliant, beautiful mathematician. What she uncovers sends shock waves through the corridors of power.
In the new crime thriller from #1 New York Times-bestselling J.D. Robb, a small and easily concealed weapon wreaks havoc, and the killer is just a face in the crowd. Jenna's parents had finally giv...