I installed the Kindle for PC Reader today. Works neat and is very easy to use. Books download in about 3 to 5 seconds. I also experimented with moving a downloaded book out of the folder where Amz puts them and then moving it back. It worked fine. The reason for this exercise was to see if someone could do the downloads here and mail them on an SD card or something to her son who is heading back to Iraq soon. He needs to install the Reader here under her account, so the books work. Alternatively, she could get him a Kindle on her account and send him her backup directory now and then, but they might start with the PC Reader first. He has limited space. Nice touch, Amazon.
--pat