title_body: Managing Kindle Collections from a computer I have plenty of e-books on my Kindle (some in the cloud and some in local only) and I created many Collections to classify my books.
  
  One silly things I tried first time was to create a folder hierarchy in my computer and when I transfer the root folder in the Kindle, it was flatten; In fact I learn after the Collections are not equivalent to Folders (it would be too simple...).
  
  After transferring few hundreds of books (and took some free ones from Amazon site) I did not found any other way to choose a Collection and then browsing all e-book from the kindle.
  
  My question is: is there a way to prepare the Collections structure from the computer (Windows and Mac OS X) and to have the books already classified after transfer?
upvoted_answer: Some options are:
  
  
  There is Kindle Collection Manager (I didn't try that.) Here are some instructions. And here you can find the developer.
  Calibre also has a Kindle Collection manager plugin, here is a howto, a semi-official forum.