which i still give them credit for. it is the most complete free book reference I have ever found, having things I could not find in my university library.

for instance the other day I was looking for an obscure text on the development of the iron mining and ironworks in a region of then imperial russia that is now ukraine. i needed information on the corporate history and operations of a company that has been dead since the 1917 revolution. university library, libgen, scihub, MAM, all these had nothing. but zlibrary had it right there as an EPUB.