Paul Theroux 
Saint Jack 

Jack Flowers, saint or sinner, caught a passing bumboat into Singapore and got a job as a water-clerk to a Chinese ship chandler. Now, on the side, he offers girls (indeed “anything, anything at all“) to tourists, sailors, residents and expatriates, but he is haunted by his lack of worldly success and his fifty-three years weigh heavily on him. So when he agrees to act as blackmailer for the faintly sinister American, Edwin Shuck, in a plot against a general from Vietnam, he has high, not to mention wild, hopes of triumph.
These are the outrageous confessions of an ingenious con man in the seedy and unforgettable world of expatriates amidst imperial ruins.