Trevayne by Robert Ludlum
Trevayne was a self-made millionaire by the time he was thirty. Then he went into government, carving out a brilliant and honourable career. Now he is head of one of the biggest foundations in the USA. Fearless, intelligent and incorruptible, he thought no one could touch him...Then his investigation into the 'secret government' led him beyond the corridors of official power into a nightmare maze where Mafia leaders and 'legitimate' billionaires mixed, where even the Presidency can be bought and sold. And where a man like Trevayne could be a dreaded enemy, a duped victim, or maybe, just maybe, a king.