I've written a short historical account on a local 17th Century shipwreck which I have been serialising on a Facebook group.
Given the very positive response I would like to publish as a small book with a local museum (not their usual thing but they are very keen). I'm planning to gift them all the sales revenue for free.
However, in the event that I can do more research and collate more information, I may opt to publish a larger book, which I would like to earn from.
Much of the facts in the book are in the public domain, and I'm even hoping that the museum could help with some facts.
Is it legal to offer a one-time non-exclusive right to publish? And is it ethical? Or should I self-publish and donate copies for their gift shop?