The Vampire Diaries will be less âloosely basedâ on the original novels in the future, according to Executive Producer Julie Plec. Fans of The Vampire Diaries novels have been pretty vocal about the differences between the novels, written by L.J. Smith, and the series. The first season of The Vampire Diaries was a wide departure from the books, and fans took notice. According to Plec, it was all done in the name of creating good TV.