This was ok -- some interesting reflections on the comedians in the middle -- but frankly, imo, and given Greene's stature, it should have been better. Hence, a book that's just a notch below 4 gets rounded down to 3.
First of all, it has none of the aching beauty of the Quiet American -- perhaps because Haiti is not as romantic in my eyes as is Vietnam. Secondly, for a book that pretends to be a political thriller (of sorts), the plot is simply much, much too loose. It really feels as though he is thinking with the pen. After reading a book as meticulously constructed as Feast of the Goat (Vargas Ilosa), or the best of John LeCarré (for instance), such slovenliness in construction simply doesn't make the grade.
Moreover -- some of the characters (the Smiths, notably) -- and make no mistake -- this book lives or dies on its characters, even more than on its plot -- rarely rise about the caricatural; and even Jones (who has great promise as a character) ends up appearing more ridiculous than full-bodied.
Such things are probably subjective. But this book left me colder than it should have.