JudyBsquared, you hit on exactly my problem ! I have around 200 books on my Kindle account, and it got to where I couldn't remember which ones I had read, and which ones I hadn't, so I just stopped downloading any. I like reading books on my phone, but how do you all separate/mark which books you've already read ? I know how to delete books from my account, but it's too much trouble and takes too much time to open every book to see if I've read it.