Ghostrwriting isn't just for novels.
You can hire a ghostwriter (or "ghost") to write just about anything, from essays, to short stories, to articles, to full-length manuscripts. When you hire a ghost, you retain 100% of the copyright to your work, AND you get to take complete credit for it. If you want, nobody has to know that you hired a ghostwriter except you and the ghost that you worked with.
Since ghostwriting means that my clients take credit for their work, I don't have a portfolio of my ghost-work that I can direct you to. However, if you send me an email, I would be more than happy to show you examples of my writing style, answer your questions about how ghosting works on your end, and have a discussion with you about price, which varies depending on the size and length of the project.