I started buying a series on Amazon. I had an issue with Amazon and now buy from other places. The last 3 books of a 21 book series are from B&N. I am suddenly feeling "messy" and want my series to be consistent.
What is the easiest conversion? Should I try converting 16 books to ePub, or just do the 3 to mobi? If I convert the 3 can I use Amazons cloud or document feature to store them? Or should I just be content with them store in calibre.
This is just a personality quirk. I like things organized.