What Makes Your Brain Happy and Why You Should Do the Opposite

Possibly a good introduction to cognitive biases for the uninitiated. A little more self-helpy than I was expecting, but self-awaredly so; and now that I write that, I think this might actually be a good introductory book for a teen or promising-but-not-yet-fossilized young adult. It seems like the kind of nudge that could lead to better self-knowledge.