We've heard of problems getting the PDF of Safari E-books to open on Mac computers. One fix is to install the Plugin PDF reader from Schubert-it. It perfectly integrates into your web browser and retains the Mac look & feel.

System requirements:

• Safari, Firefox 4.0, Chrome (with Chrome PDF Viewer deactivated)
• Mac OS X 10.6 or later

Download it at http://www.schubert-it.com/pluginpdf/