The Sony Reader supports both industry standard format, ePub and PDF so could have access to a wider number of books and also the places a person them on. At the time of writing, my first book is sitting at #8 in its category, with 7 x 5* reviews (I took a screenshot to prove it). http://WWW.Thedreammate.com/home/bbs/board.php?bo_table=free&wr_id=3716642