The Little Book That Beats the Market, by Joel Greenblatt

What a fun little book! Addressed to a 12-year old, it makes market analysis and investing seem actually understandable. I'm only half-way through but I feel I've already learned a great deal. A friend lent it to me, and it was given to her by a wealthy couple who are nearby neighbors. If you want to explain investing to your teenagers or college students, this is a great book.