The DEMO version only includes 4 pages:
https://somanybooks.org
https://somanybooks.org/winter/eng102.html
https://somanybooks.org/eng206/eng206.html
https://somanybooks.org/eng207/eng207.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page