SpyBy: David Wise Spy tells, for the first time, the full, authoritative story of how FBI agent Robert Hanssen, code name grayday, spied for Russia for twenty two years in what has been called the worst intelligence disaster in U. S. historyand how he was finally caught in an incredible gambit by U. S. intelligence. David Wise, the nations leading espionage writer, has called on his unique knowledge and unrivaled intelligence sources to write the