We are about to be contacted by an author of childrens books who is wishing to market his new book through charities. He is currently putting a separate business case forward for funding but is looking for advice from us at St Ann's on what % of profits we as a charity would expect in return for our help in marketing the books to supporters.

We have not been involved in anything like this before and whilst I would put a case forward for a decent percentage of profits I'm working in the dark a bit.

Does anybody have any experience in this area or could offer advice?