If you have any problems opening the books from the Pop-Up menu, please follow these steps to open the PDF files directly from the CD-ROM:

1. Insert the CD-ROM. If the menu comes up, please close it.
2. Go to my computer. Right click on your CD-ROM drive, and choose "open".
3. Double-click the "books" directory.
4. Double-click on the book PDF file that you wish to open.

The PDF files may also be copied to a folder on your desktop.