A custom ghostwriting agency is a company that provides professional writing services to clients who wish to remain anonymous. Ghostwriters are hired to write books, articles, speeches, and other written materials for clients who do not wish to be credited as authors. Ghostwriters are typically paid a flat fee or a percentage of the royalties earned from the sale of the finished product. Several online custom ghostwriting services have expert ghostwriters who can provide you with professional ghostwriting services. Article writing, childrens book writing, book formatting, SEO writing, Wikipedia writing, Amazon marketing, editing and proofreading, creative writing, blog ghostwriting, and other services are commonly used custom ghostwriting services.