Martin Wolf's take on the book is characteristically to the point, and the best short summary I have seen as yet:
After the financial crisis, economics is in the doghouse. Rodrik, one of the world’s most perceptive policy analysts, wants it let out again, albeit on a leash. One should, he insists, regard economics as “a collection of models”, not as a single grand, overarching theory. The economist’s art lies in knowing which model is appropriate to the task at hand.
Here is the link and the other books on the list.
UPDATE: The book has also made The Economist's list of best economics books of the year.