ghostwriter

Last time I saw Johnny, he was picking a ghostwriter for his book.

Literary blogger Harriet Post takes notice, and immediately attempts to track down his clearly very talented ghostwriter.

He's widely believed to have been the ghostwriter of the Balfour Declaration.

She is a former ghostwriter who has worked on the memoirs of several high-profile politicians and journalists.

Blair shunned the services of a ghostwriter, and penned the book himself in between various political and business engagements.