You can just go on the website, search for the book you want, and download it. I'd think this is pretty obvious, as if you visit https://annas-archive.org https

You can just go on the website, search for the book you want, and download it. I'd think this is pretty obvious, as if you visit https://annas-archive.org https://annas-archive.org, there are multiple search boxes there that lead directly to downloads.