William F. Buckley 
High Jinx [EPUB ebook] 

The “witty, charming, and courageous” CIA agent hunts for a mole inside MI6 in this New York Times–bestselling Cold War thriller series (Publishers Weekly). Albania may be a small nation, but it’s about to become the front line of the Cold War. In hopes of toppling the brutal Communist regime that controls the country, the British intelligence service has handpicked an elite group of Albanian freedom fighters to be molded into commandos by Blackford Oakes, the CIA’s all-purpose warrior. With the help of MI6’s most ruthless clandestine agent, Oakes is charged with turning the Albanians into a team of guerillas who will parachute back into their homeland to fight the good fight—and together, die.   When the Albanian mission ends in disaster, however, Oakes smells a rat inside MI6, and he begins a hunt for the most notorious mole in the history of espionage.  High Jinx is the 7th book in the Blackford Oakes Mysteries, but you may enjoy reading the series in any order.