A hyper-fast quantum computer is the digital equivalent of a nuclear bomb: whoever possesses one will be able to shred any encryption in existence, effectively owning the digital world. The question is: Who will build it first, the United States or China? The latest of David Ignatius's timely, sharp-eyed espionage novels follows CIA agent Harris Chang into a quantum research lab compromised by a suspected Chinese informant. The breach provokes a mole...

"Graham Weber has been the director of the CIA for less than a week when a Swiss kid in a dirty T-shirt walks into the American consulate in Hamburg and says the agency has been hacked, and he has a list of agents' names to prove it. This is the moment a CIA director most dreads. Weber turns to a charismatic (and unstable) young man named James Morris who runs the Internet Operations Center. He's the CIA's in-house geek. Weber launches Morris on a...