I’ve used
z-library books several times, and overall, I’ve had a pretty good experience. The quality of the eBooks varies, but most are of decent quality, especially the popular ones. Some older or rarer books might not be as clear, but in general, they are readable. As for security, the site itself isn’t malicious, but like any free, unofficial platform, there’s always a risk of malware, especially with ads or pop-ups. I recommend using an ad blocker and making sure your antivirus is up to date. I’ve never had a problem with malware, but it’s always better to be cautious. Also, always check the file format before downloading—it’s safer to stick to ePub or PDF files over executable ones.