The Princess Diaries is a series of epistolary young adult novels written by Meg Cabot, and is also the title of the first volume, published in 2000.Meg Cabot quotes the series' inspiration on her website stating: "I was inspired to write The Princess Diaries when my mom, after the death of my father, began dating one of my teachers; they later went on to get married just as Mia’s mom does in the book! I have always had a 'thing' for princesses (my parents used to joke that when I was smaller, I did a lot of insisting that my 'real' parents, the king and queen, were going to come get me soon, and that everyone had better start being a LOT nicer to me) so I stuck a princess in the book just for kicks...