Originally Posted by pdurrant
I have a folder containing all the ebooks I've bought but I haven't read yet. I only have these books on my Kindle/iPhone/Opus.
When I've read a book, I delete it from the folder.
If it's on my ereader, I haven't read it yet. When I finish reading a book I delete it from the ereader. All books are saved in Calibre in case I want to re-read a book at a later date.