Grant, Helen

Pia, the last person to see ten-year-old Katharina Linden before she vanished, is determined to find out what happened, but her quest becomes complicated when a second child disappears.

Following her grandmother's death in an accident, ten-year-old Pia receives most of the blame and is shunned by everyone in her small community except for Stefan, the most unpopular kid at school. But when a girl named Katharina Linden vanishes, Pia and Stefan launch their own investigation that is inspired by the town's local legends.

When seventeen-year-old Lin and her family move to an ancient German castle for a year while her medievalist father searches for the famed Allerheiligen glass--lost stained glass windows that are said to be haunted by a terrifying demon--she becomes involved in a horrific murder mystery.

Pia, the last person to see ten-year-old Katharina Linden before she vanished, is determined to find out what happened, but her quest becomes complicated when a second child disappears.