A chilling and revelatory appraisal of the new faces of espionage and warfare on the digital battlegroundShortly after 9/11, Joel Brenner entered the inner sanctum of American espionage, first as the inspector general of the National Security Agency, then as the head of counterintelligence for the director of National Intelligence. He saw at close range the battleground on which adversaries are attacking us: cyberspace.Like the rest of us, governments and corporations inhabit “glass houses,” all but transparent to a new generation of spies who operate remotely from such places as China, the Middle East, Russia, and even France. In this urgent wake-up call, Brenner draws on his extraordinary background to show what we can—and cannot—do to prevent cyber spies and hackers from compromising our security and stealing our latest technology.