On a Mac
In the Mac Safari browser, click on the link to open
the book in a book reader called Adobe Acrobat. If you
do not have the reader on your computer, install
it here for free.
If you want to download the book for printing, holding
down the control key while clicking the link opens a
popup menu in which you can choose "download linked file".
Once the book opens, adjust the magnification
of the reader to 100% (command – or command +)
so that you can see the whole page. Then use the
arrow keys to change pages.