SEATTLE – Bono calls the economist Jeffrey Sachs “the squeaky wheel that roars.” To me, Sachs is the Bono of economics – a guy with impressive intelligence, passion, and powers of persuasion who is devoting his gifts to speaking up for the poorest people on the planet. So it was no surprise to me that a journalist would find Sachs to be a compelling central character for a book – and a good way to draw readers into the potentially dry subject of international development.