"The Man Who Knew Too Much may be the most important book written on the assassination of President John F. Kennedy. Here journalist Dick Russell tells the story he has spent the past seventeen years investigating. It is the story of a man who had knowledge of a conspiracy to kill Kennedy - and sought to warn the governments of three nations in advance. It is the story of a man, Richard Case Nagell, who was assigned by the Soviets to prevent the assassination of Kennedy by killing Lee Harvey Oswald. What had begun as a separate intelligence operation utilizing Oswald ended with Oswald and Nagell enmeshed in a plot against Kennedy - a plot Nagell himself tried desperately to stop." "Richard Case Nagell - a former CIA operative, KGB operative, and a comrade-in-arms of Oswald - is still alive. He knows more about the espionage web surrounding Oswald and the events leading up to the assassination than anyone else except the perpetrators." "Dick Russell exposes these startling facts: the FBI's and CIA's failure to act on information before the assassination about Oswald and two co-conspirators; three earlier plots to assassinate JFK; Oswald's ties to both US and Soviet intelligence agencies; the links to a Soviet spy network inside the CIA; the role of a cabal of right-wing extremists connected to Cuban exiles, the Pentagon, Texas oilmen, and organized crime; a military unit known as Field Operations Intelligence, whose existence has never been publicly revealed; the Far East intelligence connection; Oswald's two mysterious trips to Mexico City; and the CIA/Pentagon's development and use of "mind control.""--BOOK JACKET.