Because I joined the 2009 Young Adult Challenge, I decided this would be the time to read the Princess Diaries series. I've been working my way through them, and just finished the fourth volume, Princess in Waiting.
This one was, in my opinion, the best one so far! It starts with Mia in Genovia for the holidays, where she is pining for her new boyfriend. When she gets back to Manhattan, her Grandmother (who is NOTHING like sweet Julie Andrews from the movie version!) is trying her best to ruin Mia's life, like always. It has a great, sweet ending and I'm ready to move on to Volume IV and a half.
If you have a tween who loves drama, or are like me and has to read the book if there's a movie, this series is great. I cannot wait until Big Sis is old enough to read this series.