I had written an 8-issue (176 page) comic book project. I found an artist online, and we both signed typed contracts (unnotarised, unwitnessed, but scanned so we both owned copies). The contracts were done issue-by-issue, with the project being aborted after issue 3 of 8 was completed (financial and personal reasons). There was never an intention to publish, but our amateur self-created contracts stated that the artist would have 30% creator rights on the property. No contract was signed for the whole project, only one issue at a time.
The project has now been created as a novel. This is a different format. Therefore the original artist of 3 issues of the aborted comic book project has had no input into its creation. However, if the novel version does make its way to market, and to ensure the artist gets their due, what rights do they have to the novel property, if any?