title_body: Upload & Read eBooks in Chrome (i.e. Maintain a Cloud Library) For some reason I haven't been able to find anything - extension, app, website - that let's me take my ebook library to the cloud and read from it. There are two solutions I've been able to find, but they don't work quite as well as I want them to.
  
  First, Google Play Books. I can upload books there, I can download them to my devices, sync reading progress, actually read them... but it only works for the EPUB (and PDF, but I don't read PDFs) format. No MOBI. 
  
  Alternatively, I've got a Calibre library set up in Google Drive, which is a really wonderful way to be able to access the hundreds of books I've got there, but while Calibre itself can open nearly any format out there, I can only use it on a computer, and only on a computer I can install it and Google Drive on. No browser or mobile app.
  
  I guess what I am asking here is something with everything Play Books has, but also MOBI support. Has anyone seen such a tool?
upvoted_answer: Have you tried the Kindle Web Reader? Kindle supports MOBI and you can import personal documents into your Kindle Library via an email address that is attached to your Amazon/Kindle ID.
  
  You can access your Kindle library through a web browser, and if you use Chrome, there is a Chrome App that supports Offline reading. I believe your personal documents will be synched across devices just like native Kindle books.