America is ruled by an intelligence-industrial complex" whose allegiance is not to the taxpaying public but to a cabal of private-sector contractors. That is the central thesis of Spies for Hire: The Secret World of Intelligence Outsourcing by Tim Shorrock, ... an investigative journalist. His book [provides a] disturbing overview of the intelligence community, also known as "the I.C." Mr. Shorrock says our government is outsourcing 70 percent of its intelligence budget, or more than $42 billion a year, to a "secret army" of corporate vendors. Because of accelerated privatization efforts after 9/11, these companies are participating in covert operations and intelligence-gathering activities that were considered "inherently governmental" functions reserved for agencies like the Central Intelligence Agency, he says. Some of the book's most intriguing assertions concern the permeating influence of the consulting firm Booz Allen Hamilton. In 2006, Mr. Shorrock reports, Booz Allen amassed $3.7 billion in revenue, much of which came from classified government contracts exempt from public oversight. Among its more than 18,000 employees are R. James Woolsey, the former C.I.A. director, and Joan Dempsey, a former longtime United States intelligence official who declared in a 2004 speech, "I like to refer to Booz Allen as the shadow I.C." The "revolving door" between Booz Allen and the I.C. is personified by Mike McConnell, who joined the firm after serving as head of the National Security Agency under President Bill Clinton, only to return as director of national intelligence under President Bush.