This is a different sort of puzzle book. If you solve 
the puzzles in this book --- or even if you just cheat 
and read the solutions! --- you'll learn a lot about 
economics, a lot about how to interpret statistics, and 
maybe  a little about math, physics and philosophy.

As you might expect if you're familiar with some of those
subjects, not every puzzle has a clear unambiguous answer.  
But that doesn't mean that all answers are equally good, and 
the ``solutions'' will at least aim to sort out the best 
from the worst.

There is, though, one way this book  is just like every other
puzzle book:  It's meant to be fun.  To that end, I've
scattered in a few puzzles that I think are especially fun, 
even when they have no deep lessons to teach.

Here and there, I've also indulged in some (occasionally 
rambling) commentary that I hope will make the lessons of 
the puzzles either clearer, or more fun to think about, or 
(ideally) both.

If this book has a moral it is this:  Think beyond the obvious.
What seems obvious is often wrong.  That's both why puzzles are
fun and why economics is important.