hi everyone
also this is my 3rd kobo due to software crash and unable to reinstall thought was a great piece of kit when 1st got
not so sure now
i have spent alot of time with this same issue saying book was in library but it was not
i have been using calibre and sending books all looked good
also have been sending books to both memory card and main memory still no luck
but success today very east fix
reset kobo to factory settings
set kobo up as if new but u should have most stuff ready to go if was paired with facebook
and then the easy bit press library on kobo then middle button at bottom not touch screen the one that looks 4 little lines next to home button and import everything from memory card (expanded memory card)and thats it all working and books that did not show up do now happy days
hope this helps someone and save them loads of hair pulling
also does any one else notice how long it takes to load books very slow and annoying