In 1964, a book entitled The Invisible Government shocked Americans with its revelations of a growing world of intelligence agencies playing fast and loose around the planet, a secret government lodged inside the one they knew that even the president didn't fully control. Almost half a century later, everything about that "invisible government" has grown vastly larger, more disturbing, and far more visible. In his new book, Tom Engelhardt takes in something new under the sun: what is no longer, as in the 1960s, a national security state, but a global security one, fighting secret...