The user may be able to upload images, and then drag and drop that images on the book cover place. The user will write some texts too on the cover. This text must be drag and drop too. The user must be able to choose font sizes, font colors... the normal things.
The script must be integrated with PHP. After the user create their book cover, the scipt must export an image with the book created.
You may have many questions. Just ask, I will reply.
I will send more details soon. I am waiting for your comments and your bids.
Thank you for your time.