A ghostwriter helps an author write books, short stories or music, but is not credited as having had anything to do with the finished work. The byline goes to the author, the person who thought up the concept. The duties of the ghostwriter vary depending on the needs of the author. For instance, a politician or celebrity may want to write an autobiography. They know all the details, but do not have the writing ability to put them into an easy-to-read format. The ghostwriter will take the outline and make a book out of it. In other cases, most of the work will be done and all the ghostwriter has to do is put the finishing touches.
Ghostwriters are paid either buy the page or a percentage of the writer's income from the work. They can also work for a flat fee. The terms are up to the two parties, although the publisher may be the one who recommends and chooses the ghostwriter. A ghostwriter may make more money if she had to do any or all of the research.
A ghostwriter can get recognized by an author by being named as a contributor. The byline may say that the book was written by the author with the ghostwriter or it may use the phrase "as told to." The author may also mention the ghostwriter in the introduction, where she thanks all the people who made the book possible. On the opposite end of the spectrum, an author may want to make it appear that the work is hers alone. In that case, the ghostwriter will sign an agreement stating that they will not reveal their participation.
A ghostwriter may be employed for many types of writing. Nonfiction writers can work with politicians to write the letters in response to constituents' letters. A ghostwriter will produce the technical papers published in medical journals. Ghostwriters can be employed to make posts in blogs under different names to make it appear that the blog has more writers and is getting more traffic. Many fictional works are written by ghostwriters. Well-known authors will work up an outline and pay a ghostwriter to do the writing in the style of the author. If you see a second name in smaller print under the author's, that is a ghostwriter; more than one ghostwriter may be writing under the same assumed name.
To be a ghostwriter, you have to be a writer yourself. Having something published is a big help. Those doing technical writing need to be an expert in the field. There are many professional ghostwriting agencies through which you can get work, but they have very strict requirements. Be prepared to submit a few examples of work on a sample project for them.