The Anna Archives—over 61 million books and 95 million research papers, all free. annas-archive.org/ No registration or login is required to use it. Open the homepage and directly enter the title, author, ISBN, etc. in the search box to search. It also supports multiple languages.

I should learn and try to make something similar.

Untraceable Digital Dissident

ZeroSentinel Nano: Build Your Own Private DNS and NTP Server on a Pi Zero

Turn a Raspberry Pi Zero into a hardened local DNS resolver and trusted NTP server using Unbound, Chrony, and a locked down firewall. This step by ...