Robert Philip Hanssen was a complex man. An FBI agent for twenty-five years; a devout Catholic and devoted family man; he frequented strip clubs; put a secret camera in his marital bedroom without his wife's knowledge, so his friends could watch him having sex; and was a regular visitor to sordid internet chat rooms. He also sold some of America's most closely guarded intelligence secrets to the Soviet Union. For more than twenty years, the massive volume of the information he divulged to the Russians - from the FBI, CIA, NSA and White House - would compromise decades of espionage work, cost of the lives of key Soviet double agents and directly jeopardize Western security.This book tells the story of how Hanssen used techniques taught to him by the FBI to avoid detection to betray his colleagues and his country, and how perseverance eventually ensnared him.Pulitzer-prize winning author David Vise untangles Hanssen's web of deceit to show how he become the most dangerous traitor in FBI history. The Bureau and the Mole is a fascinating true spy thriller, as riveting as it is unforgettable.