[Tarana]

I do the same thing as Katsunami, although I did have separate libraries for Kindle, B&N and Kobo and Small Publishers to keep track of prices AND that I actually download everything.

I just wanted to add that you should create a SOURCE folder. Hold on to your original sources until you have actually read the ebook and that everything works. It's way easier to reformat a book from the original source as well.