How to write a book on foreign aid

The current books critical of foreign aid all catalog the failings of that aid.  They should instead start with and study the foreign aid successes.  The next question is whether those successes, once we understand them better, are replicable.  Maybe not, but then we would know.  And if they are replicable then we could, um, replicate them.

No one has written the book I am asking for.  Are you surprised?