Ghostwriter

He's a ghostwriter.

Although the book cover officially credited Tom as the memoir's author, his paid ghostwriter came to regret portraying the subject of his book in a flattering light.

His book's onetime ghostwriter now offers a withering critique: "Tom has the attention span and the knowledge base of a hyperactive nine-year-old."

A ghostwriter is an author who writes for someone that, in practice, only supplies his signature.

Tom is a ghostwriter.

Smith was listed as the author of his autobiography, but a ghostwriter did most of the work.

Ghostwriters, typically the faceless forces behind many books by famous non-writers, are now becoming more visible, with celebrities openly teaming up with high-profile professionals.