@Gauthier
The web site is still up and running.
But access to its content is somewhat restricted:
Z-library website is currently available only in Tor network. You can find out more and download Tor browser.
BTW, the quality of the content offered by Z-library is very mixed. I checked out some books where I own the printed version and found badly scanned, nearly unreadably ones and copies of the original eBook edition.
An example is Anne McCaffrey and S.M. Sterling's "The City Who Fought". z-lib has it in two versions, the single book and the Baen omnibus edition 'The City and the Ship'. The City and the Ship is obviously an illegal copy of Baen's eBook edition. The other version is created from a plain text version with line breaks and words at the end of the line broken with hyphens. (the raw scanned text broken into lines of equal length.) Those lines were transferred to HTML by enclosing every single line in < p> < /p>, making them paragraphs with space between each line. That the ripper didn't use a spell checker adds to the disgusting result:
'Hie' instead of 'The'; ' N ' or 'N' instead of an em-dash; 'fens' instead of 'fans'.
I stopped reading and checking within the first page.
In S.M. Sterling's Conquistador is stated:
Scanned by Highroller.
Proofed by Highroller.
Made prettier by use of EBook Design Group Stylesheet.
Very few scan errors, some sentences are broken up into two paragraphs, some of the original paragraphs split into two.
I looked into the generated html and realized that somewhere in the process em-dashes in an italic text were regarded as non-italic and therefor italic turned off before the em-dash and turned on again afterwards.
HM.