Alissa and the Castle Ghost — Jillian Ross

Princess Alissa isn't thrilled about taking history lessons from gloomy Sir Drear. Then she discovers a strange portrait that makes those lessons seem interesting. Even more interesting is Drear's refusal to discuss the portrait.

Alissa and her friend Lia set out to solve the mystery behind the portrait. Along the way, they find hidden passages, a long-lost message, and a surprising helper.

But as the girls dig into the secrets of the past, they run into trouble. More than one person wants the truth to stay buried forever. Can Alissa solve the mystery and right an ancient injustice?