Then I looked at the papers posted online , the combined texts of which look like this
the book release event at Brookings on January 21, the transcript of which looks like this
I finally got a hold of a copy of the book itself. If you are interested in techniques for assessing the impact of aid (and, parenthetically, why cross-country macroeconomics is difficult to the point of being, well... pointless) I urge you to order up a copy right now. An impressive list of the usual suspects in development economics shares insights as to what we Think we really Know about aid from Randomized trials.
But "what works in development"? I think not.
What is my view of what works in development? Here's one picture (the text of chapter 3 from The Coming Prosperity):
Many other plausible pictures are possible... None resembles an economist's navel.
More to follow on this general topic... including why framing the search for solutions in global development as Easterly vs. Sachs is a bit like framing the search for solutions to the obesity epidemic as Coke vs. Pepsi.