The books below include regular Princess Diaries books as well as some companion books. I'm reading the books in a chronological order and usually, this means the order in which Meg Cabot wrote and published them.
You can read my review of the first book here, the second book here and the third book here.
As you can read here, when I first began this series, I wasn't too sure of it as it differs quite a bit from the movies. I loved the movies so much, but these books not only have grown on me, but this series is quickly becoming a favorite. One reviewer wrote that reading these books is like reading a note from your best friend, and that is exactly what it feels like! These books remind me of the best parts of being a teen, and I enjoy reliving the moments of being a teen where I wasn't being an idiot (which to be honest, were few and far in between - but I was a teen. I hope I'm allowed some idiocy!). One word of caution: the first three books and the books below are fairly innocent, but in the book I just finished (Princess in Training), there is talk of, as Mia would call it, "Doing It." Most of these books would be suitable for 10-year-old young ladies and up, but some may not be.
Please enjoy these summaries from a combination of bn.com and goodreads.com:
Princess Mia from "The Princess Diaries" offers advice on inner and outer beauty, character development, etiquette, and dating.
Never before has the world seen such a Princess. Nor have her own subjects, for that matter. But Genovian politics are nothing next to Mia's real troubles. Between canceled dates with her long-sought-after royal consort, a second semester of the dreaded Algebra, more princess lessons from Grandmère, and the inability to stop gnawing on her fingernails, isn't there anything Mia is good at besides inheriting an unwanted royal title?
When you're Princess Mia, nothing happens the way it's supposed to. For one thing, Grandmère seems determined to prove that boy (or Michael, as he is commonly known) isn't the right one for the crown princess of Genovia. And Mia isn't having much luck proving otherwise, since Michael has a history of being decidedly against any kind of exploitative commercialization (Valentine's Day, as it is commonly known). Boris can declare his love openly to Lilly, and even Kenny comes through with a paltry Whitman's Sampler. So why can't Michael give in to Cupid and tell Mia he loves her—preferably with something wrapped in red or pink and accompanied by roses—in time to prove he's Mia's true prince?
In her heart of hearts, Mia has but one wish: an evening spent with Michael in a tux and a corsage on her wrist—in other words, the prom. Michael, however, does not seem to share the dream that is the prom. Worse still, a service workers' strike (with Grandmère and Lilly at the heart of it and on opposite sides) threatens the very existence of this year's prom. Will the strike end in time? Can Mia talk Michael out of his anti-prom views? Most importantly, will Mia get to wear her pink prom dress?
Do YOU have what it takes to be a princess?
Princess Mia will help you find out.