1. Ghostwriters: This is the most common scenario. A ghostwriter writes a book on behalf of someone else, but their name doesn't appear on the cover. They work closely with the "author" to gather information, develop ideas, and craft the manuscript. This is often used by celebrities, politicians, or busy individuals who want to share their story but lack the time or writing skills to do so themselves.
2. Co-Authors: A co-author collaborates with the primary author on a book. This can be a partnership where both individuals contribute equally, or one person may be the primary voice while the other provides research, editing, or other support.
3. Contract Writers: These individuals are hired to write specific types of content for someone else, such as blog posts, website copy, or even chapters within a larger book. They are essentially freelance writers working on a project for another person.
4. Family Members or Friends: Sometimes, family members or close friends write books about a loved one. This might be a biography, memoir, or other type of story. While they are not professional writers, their personal connection to the subject matter gives them a unique perspective.
5. Collaborators: This can be a broader term encompassing all of the above. It can also include individuals who contribute specific skills to a book, like editors, researchers, or graphic designers.
Ultimately, the person writing a book for someone else depends on the nature of the project and the needs of the "author." It's important to note that while a ghostwriter might write the entire book, the "author" still holds the copyright and is responsible for the content.