For the most part, a chasm exists between authors of books and bloggers. Many in the former group have moved to blogging as a way of promoting their books, but their content comes in the form of something needing to be purchased at a bookstore. Conversely, professional bloggers tend to get their compensation via advertising, but their readers are able to read the content free of charge. However, as popular agnostic author Bart Ehrman shows, that is not always the case.