You will need the flash plug in to view it and also Acrobat viewer installed.
If there is a dialogue box showing asking you to download click 'preview', this should bring up the media players and show the front covers.
Click the arrow in the top right corner of the player to run it full screen and again to return it to normal.
You can also download the pdf file via the drop down menu in the player.
If any of the pages show up blank leave it for a second and they should load!