Since buying my Arc I have tried to upload the 198 books, in mobi format, I have on my desktop. I have used Calibre to change them to Epub, followed all advice given to me & downloaded Aldiko, Kindle, Adobe et al. I have put 2 of the books in Arc/internal-storage/downloads & Arc/internal-storage/ kobo/epubs & still my Arc can not find them. Please does anyone know what I may be doing wrong? I am coming to the conclusion that I may as well take it back & get a Kobo Vox, put the 198 books on an SD card & read to my hearts content, as my highly amused wife is doing.