title_body: Will I be able to put Kobo books on my Sony Reader?
upvoted_answer: Absolutely, yes. I was a Kobo customer long before I had a Sony reader. I switched to Sony when my Kobo Touch died.  I was actually happy that the Sony store was killed because it resulted in the Kobo store being put on my Sony reader.
  
  You need the latest firmware update (or at least since the Kobo rollover), and then you will have a "Kobo Bookstore" option on the home screen, and under "Bookshelves", where there used to be "Books", "Collections" and "Evernote" options, there is now an additional "Purchased Content". Select "Purchased Content" and it should show you everything you've ever bought from both the Sony and Kobo stores (and it will handle DRM'd content just fine).