Freakonomics
Orson Card reviews Freakonomics by Levitt and Dubner, and sort-of concludes that everyone should read it before they vote. Thus far, it has seemed to me that this book has been more talked-about than read. The review focuses on the correlation between the increase of abortion and the decline in crime rates:
"The innovative policework in New York City was given much of the credit, but the same thing was happening in cities with no new theories or practices. All kinds of theories were advanced, but they all fell apart against statistical realities -- none of them explained why crime rates fell at exactly the time they began to fall. Except for one explanation. Abortion."
Read his entire interesting review.