The Princess Diaries
The first book in the #1 New York Times bestselling Princess Diaries series by Meg Cabot.

Mia Thermopolis is pretty sure there’s nothing worse than being a five-foot-nine, flat-chested freshman, who also happens to be flunking Algebra. Is she ever in for a surprise.
First Mom announces that she’s dating Mia’s Algebra teacher. Then Dad has to go and reveal that he is the crown prince of Genovia. And guess who still doesn’t have a date for the Cultural Diversity Dance?

The Princess Diaries is the first book in the beloved, bestselling series that inspired the feature film starring Anne Hathaway and Julie Andrews.