Daniel Suarez's New York Times bestselling debut high-tech thriller is "so frightening even the government has taken note" (Entertainment Weekly).

Daemons are small computer programs that run silently in the background, waiting for a specific event or time to activate. Only then do they carry out their intended purpose. From printing to buying and selling stocks and much more, they make our networked world possible. But they also make it vulnerable...
 
When the obituary of legendary computer game architect Matthew Sobol appears online, a previously dormant daemon activates, initiating a chain of events that begins to unravel our interconnected world. This daemon reads news headlines, recruits human followers, and orders assassinations. With Sobol’s secrets buried with him, and as new layers of his daemon are unleashed, it’s up to Detective Peter Sebeck to stop a self-replicating virtual killer before it achieves its ultimate purpose. And to do so, he must uncover what that purpose is...
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