title_body: Can I create my own ebook cloud with Calibre? I have heard that I can use calibre to create a cloud with all my books, not just ones from a specific vendor.  How would I do it?
upvoted_answer: Yes, it is possible and rather easy to do so.
  
  You start it with the connect/share button on the main toolbar, then selecting start content server; it can be configured from preferences &gt; sharing. It should be a simple task, if you need more help just ask. With this method calibre must be running because basically what you are doing is setting up a web interface to connect to it. This way it will be accessible from any web browser. See also calibre manual on this topic.
  
  I also suggest you to read this guide from mobileread.
  
  Be sure to protect your content server with a password, so you must be required to login to be able to access it. You don't want to let everyone access your copyrighted ebooks and have to do with piracy.