Muhammad
In general, there are is less doubt about the existence of Muhammad. Did you know that he is often called the most successful among religious figures and prophets? Even so, it does not mean that every single person thinks that way. A lot of people want more hard proof before they believe in his existence.
Carolyn Keene
A lot of young girls grew up reading the Nancy Drew series and idolizing the main character. What they might not know, however, is that Carolyn Keene did not really write them. That was simply a pen name! Ghostwriters worked on the bulk of the books. Edward Stratemeyer paid these workers as some backup plan. They wrote the novels in case he was unable to finish them.