At REA, we are committed to offering the most up-to-date content. The update provided here is necessary only for purchasers of the first printing of the 4th Edition.

The update details changes to the AP United States History exam announced by the College Board after the first printing of this book went to press.

To determine whether you need this update, check the cover below, and open to the copyright page. Look in the lower right corner for the coding mark. If you see "A17" as shown below, you will benefit from this update.

If you need any additional help, please contact us at studycenter@rea.com.