Experienced Ghostwriter for Original Book

I have a concept for an original book and need an experienced writer who can guide the project from idea refinement to a polished manuscript. The genre, target audience, and voice are still open for discussion, so your creativity and strategic input will be essential at every stage... (Budget: $250 - $750 USD, Jobs: Book Writing, Content Writing, eBooks, Editing, Fiction, Ghostwriting, Non-Fiction Writing, Proofreading)