Cluster of Spies — Robert L. Skidmore

A ranking defector shakes the National Security establishment to its core when he reveals that Washington's most sensitive secrets routinely pass across the Russian President's desk. Fearing that his own organization has been penetrated, the Director of the FBI summons Inspector Richard Thatcher from his exile posting to Helena, Montana to conduct an off the books investigation. Thatcher's quest takes him to the highest levels of the United States Government where he finds suspects serving in the very offices charged with protecting the nation's secrets. Distracted by the beautiful Mavis Davis, a persistent network investigative reporter, Thatcher and his team ignore the inevitable bureaucratic resentment and carry their chase deep into the innermost regions of the White House, the CIA, the Pentagon and the FBI itself.