To DNSB - Sorry copyright issue apply.
To PeterT - I have used both Calibre and the Kobo to deleted the book from the library. Then did as you suggest when I deleted using Calibre. The library shows a "EPUB" format.
Added information: Calibre has no problem viewing the book in any format. Also I forget about this: Once I select the book from the power up screen, it goes to the book on page one, but nothing on the screen, then select the next page, then it reverts to power up screen. I hope the extra information helps.