I have a bunch of ebooks that do not have imbedded images because the format does not support it (txt, rtf, etc.) or it was never formatted with a cover image. I have had some difficulty adding the cover image using "Cover Lookup". The first book I tried had the correct title and author but the ISBN was the 13 digits instead of the 10 digit version. Once I corrected that, "Cover Lookup" found the image. The second book I tried has the correct title and author and I've tried both ISBNs (10 and 13 digits) but it still won't come up with the cover. What database is Stanza searching to find the cover art? I suspect that part of the problem with the second book is that there is an apostrophe in the title because the cover image that does come up has an backslash before the apostrophe. Is there any way to fix this?

Note: Both books were best sellers recently and Google Image easily finds the cover art and Amazon has multiple images of these books so I know that it should be there.