On my desktop I have a field that I created (Creatively called E-books) and I download everything there. Since I am an avid SF reader I use the
http://www.baen.com/library/ site a lot and most of the books there are downloadable in a couple of formats minimum. They are all zipped so when I unzip them I rename them and send them to my folder. I can either drag and drop or update when I sync. I prefer to drag and drop becasue I have so many e-bpooks that I am taking some off and adding some all the time. Since I am going to Germany in June for 8 days and I understand that the only english channel on TV is CNN I am going to take as many E-books as I can cram onto my SD. Will probably get another SD just to have an unlimited supply. ( 9 hours over on the plane and about 7 coming back, yep lots of reading).
Hope this helps.