[AgeG]

Hi there,

we are looking for a solution to insert a transactional watermark to an ebook (epub), that gets inserted after a user bought the ebook.
E.g. his username/name get inserted in the ebook or some/all images get the some sort of ID in the metadata that is related to the buyer.

We don´t mind people sharing their ebook with friends, but we would like to make it a little more difficult for those, who would upload the ebook to filesharing websites. (I know the watermark can get removed and therefore this method is not perfect, but that´s ok. It should just be little more difficult for non-technical guys.)

Steps:

1.) User buys ebook in epub format
2.) Watermark gets inserted in ebook
3.) Ebook gets created
4.) User receives download link via email

I wonder, if Calibre might be the software to use for the “on the fly” ebook creation on the server?
Or are there other/more suitable tools for “on the fly” online creation of ebooks on our own server?

I am aware, that the watermarking would need to be done with a custom script and is not part of what Calibre offers.

Thank you very much for your feedback.
AgeG