Book excerpt: "As the first agent to publicly betray the CIA, Philip Agee was on the run for over forty years--a pariah akin to Edward Snowden. Agee revealed in spectacular detail what many had feared about the CIA's actions, but he also outed and endangered hundreds of agents. Agee relentlessly opposed the CIA and the regimes it backed, whether in America or around the world. In Jonathan Stevenson's words, Agee became "one of history's successful viruses: undeniably effective and impossible to kill." In this first biography of Agee, Stevenson will reveal what made Agee tick, and what made him run"--