The workbooks are in Adobe Acrobat format.
In order to view and print the file, you must download a free copy of Acrobat Reader, if it is not already installed on your system. After you download the reader you must install it in order to view the study guides. You only have to do this once. Depending on your connection speed, it may take several minutes for the study guide to download and the reader to show the document in your browser window.