Shannon,

Thank you for your message. As with anything we are constantly making changes and revisions!

The copyright of your book should be 2001 with the actual print date being listed at the bottom of that same page.

We also have a corrections page for significant changes. You can find them under http://www.alabacus.com/pageView.cfm?pageID=304.

We are happy to answer specific questions. I feel if you check the corrections area and are still struggling, give us a call at 888-272-3291 and we will guide you through!

Thank you again for the message we are happy to help in any way! Have a great day!