The Stolen Prince of Cloudburst by Jaclyn Moriarty
Esther is the middle child, sandwiched between thirteen-year-old Imogene and younger sister Astrid. She is the ordinary one, nondescript, often overlooked by her mother.
What should have been a normal year at boarding school opens with several unexplained incidents. Esther’s best friends do not return for the next school term. Two new students have taken the absent girls’ places. A tiny little woman with a bizarre ritual for greeting her students is Esther’s teacher. Life seems to have taken an unsettling turn. School is the same. Only it is not.
Set in a land of Empires and Kingdoms, it's a tale of mystery and magic. Mythological creatures abound. A Water Sprite absconds with a young child. There are Faeries, Ogres, Whisperers, True Mages, Spellbinders, and Shadow Mages such as Radish Gnomes and Sterling Silver Foxes. They usually inhabit realms far away from Esther’s school. But lately they are sighted nearby.
But was it?