Hide and seek

"Right at the top of Shiverhawk Hall live children in pictures on the wall. When the moon rises in the night sky, the DeVillechild twins are missing from their frames. The rest of the Shiverhawk children set out across the gardens and into the woods searching for the girls, beginning a game of hide and seek! Will the children be able to find the twins and return home to their paintings before the sun comes up?"--Provided by publisher.