Olivia Grace Clarisse Mignonette Harrison still finds it hard to believe that she's a real live Princess of Genovia. Not only does she get to live in an actual palace with her newly discovered family and two fabulous poodles (who all love her and think that she's anything but ordinary!) but she also gets her very own pony. Of course, things aren't going exactly like she imagined. Her half-sister Mia is very busy learning how to take over the country...

"A middle-grade spinoff of The Princess Diaries, about the long-lost sister of Mia Thermopolis, Princess of Genovia"--

Fifteen-year-old Mia tries to figure out how to raise money for the bankrupt student government at her school while also worrying about how to become a "party girl.".