Download the free ebook at THIS LINK
and the ebook will be stored in the Downloads Folder and
opened in whichever of the pre-installed ebook readers are present.
My preference is for the "Alread", "Fullreader" or "Pocketbook" Apps.
which all show a button button at top or bottom of screen.
At the right and left edges you can turn the pages Forward
→ and back ←.
and Settings, and Choose another ebook are somewhere (variable).