Saving Faith by David Baldacci
Danny Buchanan is a top Washington lobbyist who once earned a vast fortune serving the interests of giant corporations. Appalled by the desperate poverty he witnessed on his global travels, he decided to use his political genius to help the world's poor. With the loyal aid of his assistant, the attractive and committed Faith Lockhart, Danny works tirelessly and in secret to redress the balance of power.
But Robert Thornhill has rather different ideas of public service. A ruthless top-ranking veteran of covert CIA activity, he discovers the secret of Danny's political influence and is determined to destroy him . . .
'He is able to deliver eloquently what the public wants' GUARDIAN