I'm a tech writer, no fiction. Still, I sent two pages of a fictional character and world development to a freelance creative writer on the internet. I paid for the first 1000 words, which were great! So great, that I was inspired to develop a novel length work for this writer. It became a huge work that looks more like a trilogy. My development of the protagonist, his friends and organizations extends to a hundred pages with a hundred scene suggestions. But the novel is a thriller; it is not only about the protagonist. So, I did similar development on the novel's plot, subplots, cast of characters, events, and scene suggestions which run for another 150 pages. All of which, I have not shown to anyone. Of course, in my humble fantasies of success, the character is endearing and exciting, and the novel will become a book series, a comic book character, and a movie extravaganza. No, really..lol. If this were a perfect world, I could dump all of that work onto my freelance writer, pay him his typical rate, and get a fabulous trilogy in return. The all-at-once data dump would allow my freelance writer to see the complete arc of the story so that he can apply his creativity to the best effect. However, I have a feeling that this would not be a wise thing to do. What if my work product were leaked, shared, posted on the internet, or developed and sold by other writers? If my work product is as good as I humbly think it might be, then the $million temptation to scam me might be too great for some people to resist. My question is: How can a creator safely share a huge fiction development with a freelance writer? Even though my freelance writer has a great internet reputation, I am still concerned. I have thought about inviting the writer to become a partner with success sharing. For example, I would pay his regular writing fee, and offer him 25% of net profits minus amounts already paid to the writer. Also, I might ask for a collaborating writer agreement, nondisclosure agreement, and copyright agreement. Please share your advice and experience. Thanks from a newbie.