The first site I ever used for getting e-books was the-eye.eu's World Tracker Library. When the-eye went down and came back it looked like most of that section was gone, but just recently I discovered that there's still an enormous collection of links at https://the-eye.eu/public/Books/World%20Tracker%20Library/worldtracker.org/media/library/English%20Literature/sitemap.htm. However, actually trying to click on any of the links to download promptly results in me being blocked by one of my adblockers with the following message:
uBlock Origin has prevented the following page from loading:
Because of the following filter:
/jr.php?gz=$document Found in:
uBlock filters – Badware risks
Since it's an adblocker, though, I dunno how much of a risk there really is. I'd really like to be able to use these files as they're a lot more conveniently organized than the other sites I've been forced to use since the-eye originally died, but not at a risk to my computer.
There's a few badware filters available for UBO. These filter lists are all maintained on a volunteer basis and it's not absolute that if a filter trips a warning it's for sure a bad site. I'm an avid UBO user myself, have it customized to an extent using advanced options. I tend to trust the warnings I get, but can you also take them with a grain of salt.
If you really want or need to access the site you can investigate the flag and assess the risk yourself. If you find it's not actually a threat, typically UBO gives you the option to ignore the warning and continue. You can also whitelist stuff on a site by site basis.
The option to ignore it exists, but I dunno how to test whether or not it's safe without actually potentially exposing my computer to malware. Which is the whole problem.