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 - [COPS](https://github.com/seblucas/cops) Calibre OPDS (and HTML) PHP Server : web-based light alternative to Calibre content server / Calibre2OPDS to serve ebooks (epub, mobi, pdf, etc.)
 - [b-ok](http://b-ok.xyz/) Free ebook library
 - [The idiot-proof guide to downloading ebooks off IRC](https://www.reddit.com/r/Piracy/comments/2oftbu/guide_the_idiot_proof_guide_to_downloading_ebooks/) Posted by /u/Servaplur
-- [Guide to Copy Kindle Content to PDF using Calibre](https://www.reddit.com/r/Piracy/comments/7vc3uv/guide_to_copy_kindle_content_to_pdf_using_calibre/)
+- [Guide to Copy Kindle Content to PDF using Calibre](https://www.reddit.com/r/Piracy/comments/bm837l/guide_to_copy_kindle_content_to_pdf_using_calibre/)
 - [Apprentice Alf's Blog](https://apprenticealf.wordpress.com/) Everything you ever wanted to know about DRM and ebooks but were afraid to ask.
 - [Calibre](https://calibre-ebook.com/) :star2: ebook management tool
 - [Calibre-Web](https://github.com/janeczku/calibre-web) Web app for browsing, reading and downloading eBooks stored in a Calibre database