Having recently discovered she is the sole heir to the throne of a tiny European principality, fourteen-year-old Manhattan resident Mia writes in her journal about her attempts to cope with this news, as well as with more typical teenage concerns.

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

Princess Mia has just graduated college. She is soon going to take over as Queen of Genovia from her grandmother, Queen Clarisse. However, Mia learns that she must marry in 30 days or forfeit the crown of Genovia to another rightful heir, Nicholas Devereaux. His uncle, Vicount Mabrey is really the one who wants Nicholas to be King. Not trusting Nicholas, Mia picks a decent guy who's sweet and charming and likeable, but can she go through with the...

In a series of diary entries, Princess Mia describes celebrating Christmas with her friends in Genovia.

High school sophomore Princess Mia records in her diary her struggles with geometry, the expectations of being a college student's girlfriend, running for president of the student council, and a potential ecological disaster in her native land, Genovia.

During the days before her sixteenth birthday, Mia records in her diary her fear that her grandmother and friends may be planning to throw an extravagant Sweet Sixteen party.

Princess Mia's junior year in high school begins with a difficult course load, a crazy student council race, Grandmere's search for temporary lodging, and learning that her boyfriend is moving to Japan for a year, partly because she will not sleep with him.

It's princess Mia's senior year. She's been accepted to her dream colleges and her 18th birthday is coming up. Mia isn't certain her boyfriend, J.P. is the one. Her first love, Michael, is back from Japan and back into her life. But Mia's father is losing in the Genovian pools to Mia's loathsome cousin Ren̈еe.

"Diary, it's time to snow big or go home. Claudia is coming up to the clouds for a sleepover! I've spent the night at Claudia's house before, and it's the best thing on earth (or in the sky): trampolines, pizza and staying up late! That's a lot to live up to, Diary. Fortunately, I have the perfect sleepover planned. There's just one small snowball of a problem: Great-aunt Eastia is visiting. She loves me, but she has some definite opinions on Proper...

Lina, a Windtamer who controls the wind and lives in a palace in the clouds, wants to go to a regular, non-magical school with her best friend Claudia, but first her grandfather must teach her to control her powers.