A princess of Landover
"Princess Mistaya hasn't been fitting in too well at Carrington Women's Preparatory. People don't seem to appreciate her using her magic to settle matters in the human world. So her father, the King of Landover, sends her to renovate Libiris, the long-abandoned royal library. But deep within the Library there lies a secret so dangerous that it threatens the future of Landover itself..."--Publisher description.