The Princess Diaries, Volume IV and 1/2: Project Princess

Blurb

The Princess Diaries, Volume IV and 1/2: Project Princess is a young adult novel in the critically acclaimed Princess Diaries series. Written by Meg Cabot, it was released in 2003 by HarperCollins Publishers and is the first novella in the series.
Most princesses would prefer to spend their spring breaks in Gstaad, or some other equally unpronounceable European hot spot.
Not this one, though. Hammer in hand, Princess Mia embarks on an epic adventure for one so admittedly unhandy: along with her cohorts from school, she's off to build houses for the less fortunate. It doesn't take Mia long to realize that helping others—while an unimpeachably noble pastime—is very hard work. Will her giving spirit prevail? Will the house collapse due to royally clumsy construction? And most importantly, will Michael stop working long enough to kiss her?