Ghostwriting is, basically, heavy editing. You may have a brilliant idea, but have trouble with compound sentences, dangling modifiers, creaky grammar, messy organizational skills. A ghostwriter might save your bacon. But understand that good ghostwriters are hard to find, and their fees will be hefty (if their rates are cheap, so will their work be).
Ghostwriters may or may not require acknowledgement, such as their name on the cover: "as told to," for instance.
Here is a roster of ghostwriters.
Ghostwriters are versatile, but check on their expertise as it relates to your work. Legal? fiction? gardening?— find someone appropriate to your topic.
JOHN MARTIN, Black Sparrow Press. “For twenty-five years, Sasha has always responded with enthusiasm and initiative to the requirements of our demanding publishing schedule.”
THOMAS RYDDER, writer: “Thanks so much. This is actually the most insightful criticism I've received on any of my writing, and it's immensely helpful.”
Sasha — Thanks for the good work — very thorough.