While Mia tries to get over breaking up with her boyfriend, she discovers a diary kept by a former princess of Genovia from the 1600s, the contents of which could change the fate of her country forever.

Princess Mia Thermopolis has hit an all-time low. Lilly isn't speaking to her. Someone is posting horrible things about her on ihatemiathermopolis.com. Grandmere is forcing her to give a speech to two thousand of the most powerful businesswomen in America. And, oh yeah: Michael, the love of her life, has dumped her. But despite what the press seems to think, Mia has more on her mind than recruiting a new Prince Charming. Like solving a 400-year-old mystery that could mean BIG changes for little Genovia. But is Mia really ready to throw away her tiara - especially if it means destroying a dynasty? Bad Heir Day, previously published as To the Nines, is the ninth in the bestselling The Princess Diaries series by Meg Cabot.

'You're not Mia Thermopolis any more, honey,' Dad said. 'You're Amelia Mignonette Grimaldi Thermopolis Renaldo. Princess of Genovia.' A PRINCESS?? ME??? Yeah. Right. One minute Mia's a totally normal Manhattan fourteen-year-old. Next minute she's heir to the throne of Genovia, being trailed by a bodyguard, taking princess lessons with her uncontrollable old grandmere, and having a makeover with someone called Paolo. Well, her dad can lecture her till he's royal blue in the face, but no way is Mia going to turn herself into a style-queen. And they think she's moving to Genovia? Er, hello? Meg Cabot's The Princess Diaries inspired the feature film starring Anne Hathaway and Julie Andrews. This beloved series continues in the second book, A Royal Disaster.

With the release of Disney's sequel to the Princess Diaries movie in August, the princess phenomenon will be in full swing in 2004. Girls will be overjoyed with this hilarious addition to their favorite series, which involves seven minutes in heaven, citywide strikes, and Mia's mission to get asked to the senior prom.

Princess Mia is introduced to her Genovian subjects, and more importantly, she goes out on a date.

All you need to know to be a princess— Or Just live like one Compiled by Mia Thermopolis aka Princess Amelia Mignonette Grimaldi Thermopolis Renaldo of Genovia

Just when Mia thinks life will be back to normal, her indomitable grandmere schedules a national television interview for Mia, her best friend Lilly styles herself Svangali to an Indiana newcomer, and her mother starts dating her algebra teacher.