The Night Manager

Enter the new world of espionage, where the skills forged by generations of spies during the darkest days of the Cold War are put to even more terrifying use. Penetrate the secret world of ruthless arms dealers and drug smugglers who have risen to unthinkable power and wealth. The sinister master of them all is an untouchable Englishman named Roper, the charming, unstoppable ruler of a corrupt world all his own.
Slipping into this maze of peril is a former British soldier, Jonathan Pine, who knows Roper well enough to hate him more than he hates any other man on earth. Now personal vengeance is only part of the reason Pine is willing to help the men at Whitehall bring Roper down.

"From the Paperback edition."