Hollow City

Lena Holloway travels to Prague after supernatural beings begin disappearing, only to discover the hidden Hollow City and Lucien Hollow, Seraphine's supposedly dead brother. As the fourth lock fails and Adrian's connection to Auren grows stronger, Lena uncovers a terrifying truth about the Veil, the Null, and her bloodline. To save Adrian, she may have to enter the darkness—and face the mysterious...