Hi! I am new to Calibre and used it with my new Kobo Clara HD. Two books I sent, one in PDF and one in ePub, display their titles correctly in the library view but when I send them to the device the titles show up as 'Unknown'. I have tried searching the forums but couldn't find anything about this. Does anyone know why this is happening? I am sorry if this has been asked several times already and if this is the wrong forum to ask this question, I am not only a new Calibre user but also a new user of the forums