Just to give more details about it so someone may help me.
This is the URL of the book:
https://archive.org/details/statisticsforbus0000vanm
It says:
https://i.imgur.com/lTS6lm4.png
There are 2 links given regarding the book:
https://www.edrlab.org/readium-lcp/c...-apps-servers/
and
https://thorium.edrlab.org/en/
So I am searching for any way to decrypt it.
Thanks