Trouble at Oakwood View

Catherine Ryder doesn't know whether to be excited or wary about the new governess, Cordelia Shultz. Catherine's three sisters have adopted the young, cheery governess as the mother they never knew, but Catherine remains unconvinced. A dark and sinister mystery surrounds Cordelia Shultz, and Catherine vows to find out what it is. Why does Cordelia seem so secretive? And why does she disappear suddenly in the middle of the night?