Question about ISBN numbers
Will it mess up Calibre f I have more than one book with the same ISBN number? I like to keep my cooking recipes in Calibre so I can easily put them on my Reader. I was thinking of assigning them all the ISBN number for the Joy of Cooking so that I have a pretty cover to look at. But will it mess up Calibre if more than one book has the same ISBN number? If so, what is the best way to set this image as the cover for all the recipe ebooks?