A couple of times, when I couldn't get the iSight to read, or the result seemed too different, I entered titles manually. Then I got a range of results (sometimes 20 or 30 different ones) referring to different editions. Here, I was often able to find my edition (which was still quicker than putting in the information by hand would have been).
When inputting the ISBN, either with iSight or by hand, is it possible to return multiple results in the same way?
I thought that one ISBN was one edition/printing, but it isn't - often there are different covers for the same book with the same ISBN. And several of these different covers can still be viewed with Amazon. If we could ask Bookpedia to find all occurences of the ISBN, then we could probably find the correct cover. This would save us inputting the correct cover picture with iSight (or simply leaving the wrong cover).