Hi, I'd love some assistance on which ereader to buy for my husband who is 81. He reads about 6 library books per week, has published his own books on streetcars (trams) and would be interested in publishing more. I'm assuming that "epub" means you can publish your own material on the ereader? Other than that he just needs a simple, easy to view ereader, doesn't need the web or games etc. Any help on the best model would be much appreciated. Thanks