The Glass Demon

Sometimes the path to the truth is paved with broken glass. 
 
Teenager Lin Fox is a stranger in a strange land—Germany, where her father has come on a quixotic quest to locate a priceless artifact. The medieval (and possibly mythical) Allerheiligen stained glass is believed by some to be lost, by others to have been destroyed, and by virtually all to be haunted. A mysterious letter persuades Dr. Oliver Fox that he can be the one to find it—but someone else is determined to ensu…