On a Desktop
The browser on your desktop will likely open a book to look something like this:
Which will cut of a large portion of the page.
To view the page properly,
resize the browser to as tall as you can make it...
then squish in the side, making it thinner.
Eventually you should see the navigation-forward arrow.
When you can see that,
then you have the full page!
On a Tablet or Phone
On touchscreens you can swipe to the next page (as well as use the navigation arrows.)
Also, you are still able to pinch/spread to zoom.