In this third book in New York Times bestselling, Newbery Honor-winning author Shannon Hale's Princess Academy series, Miri goes from student . . . to teacher!

Miri has spent a year at the palace, learning all about being a proper princess. But before she can return to her beloved Mount Eskel, the king has a task for her: Miri must travel to a distant swamp to start a princess academy for three sisters, cousins of the royal family. Unfortunately, Astrid, Felissa, and Sus are more interested in hunting and fishing than royal rules.

As Miri spends more time with the girls, she realizes the king and queen's interest in them hides a long-buried secret. Relying on her own strength and intelligence, Miri must unravel the mystery while protecting the sisters--and maybe then she can finally make her way home.