Has anyone discovered a good book on how to manage your kindle. I'm pretty sure I'm going to get a kindle as soon as I can find a sale. I'm leaning toward the HDX because it's supposed to be really fast. Just not sure if I'll know what to do with it after I get it. Does Amazon still have a history of your books if you use the tablet. I'm wondering why you would move the ones you've read to cloud and I had no idea you should delete it from cloud if you want to save space. I'm totally confused and I haven't even bought one yet.