Another problem is that I must use an ISBN-number for a book...I have books from young writers, without isbn. How can I disable that?
That need for take main book infor from Amazon. We take it with help ISBN.
If yours book not exist on Amazon - or for it not exist ISBN you need for "Fetch Information" set "On your own" and fill all fields manual
This is a problem. So I must fill in my own number, for example xxx. But that mus be an unique number, because the image files get the name of the isbn_numbers.
Can the images keep their image-name?