To understand , one must understand the lineage of shadow libraries. The ecosystem began with Library Genesis (LibGen) , which was created by Russian scientists to share expensive academic papers. This was later followed by Z-Library , a massive expansion that popularized the user interface most users are familiar with today.
Professionally formatted, public-domain digital books. b-ok.africa books
bok africa – projects for social justice and sustainability To understand , one must understand the lineage
Instead of using unstable or legally risky shadow libraries, consider: year of publication
Allows narrowing down results by language, year of publication, publisher, and file format (PDF, EPUB, MOBI).
It sounds like you're looking for a about the website b-ok.africa (often associated with the now-defunct BookFinder / Z-Library mirror ecosystem).