Bella, Gwen, and the Lost Boys have escaped to Alnwick Castle, but it is not the safe haven they hoped it would be for the "cure" for the Horologia virus has mutated into something even worse--so the Duchess Alyssa and Maddox Hadder set out searching forthe virus's origin, an extinct poisonous apple, supposedly from a tree at the center of a labyrinth hidden deep within Germany and guarded by monsters.

"Germany, 1946: Emmy Clarke is a librarian not a soldier. But that doesn't stop the Library of Congress from sending her overseas to Germany to help the Monuments Men retrieve and catalog precious literature that was plundered by the Nazis. The Offenbach Archival Depot and its work may get less attention than returning art to its rightful owners, but for Emmy, who sees the personalized messages on the inside of the books and the notes in margins of...